In the last decade, financiers have speculated billions of pounds in food, helping to make prices dearer and more volatile

Speculation by large investment banks is driving up food prices for the world's poorest people, tipping millions into hunger and poverty. Investment in food commodities by banks and hedge funds has risen from $65bn to $126bn (£41bn to £79bn) in the past five years, helping to push prices to 30-year highs and causing sharp price fluctuations that have little to do with the actual supply of food, says the United Nations' leading expert on food.

Hedge funds, pension funds and investment banks such as Goldman Sachs, Morgan Stanley and Barclays Capital now dominate the food commodities markets, dwarfing the amount traded by actual food producers and buyers. Purely financial players, for example, account for 61 per cent of investment on the wheat futures market, according to the World Development Movement report Broken Markets.

Speculative investment in agricultural commodities in 2011 was 20 times the amount spent by all countries on agricultural aid. Goldman Sachs, the largest player in the agricultural commodities market, earned £600m from food speculation in 2009, and Barclays Capital, the world's third-largest player and largest British bank in this market, earned up to £340m in 2010, according to the report. Goldman Sachs and Barclays Capital declined to comment.

Defector tells how US officials 'sexed up' his fictions to make the case for 2003 invasion

A man whose lies helped to make the case for invading Iraq - starting a nine-year war costing more than 100,000 lives and hundreds of billions of pounds - will come clean in his first British television interview tomorrow.

"Curveball", the Iraqi defector who fabricated claims about Iraq's weapons of mass destruction, smiles as he confirms how he made the whole thing up. It was a confidence trick that changed the course of history, with Rafid Ahmed Alwan al-Janabi's lies used to justify the Iraq war.

The Grand Mufti of Saudi Arabia has said that all churches in the Arabian Peninsula must be destroyed. The statement prompted anger and dismay from Christians throughout the Middle East.

Grand Mufti Sheikh Abdul Aziz bin Abdullah made the controversial statement in a response to a question from a Kuwaiti NGO delegation. A Kuwaiti parliamentarian had called for a ban on the construction of new churches in February, but so far the initiative has not been passed into law. The NGO, called the Society of the Revival of Islamic Heritage, asked the Sheikh to clarify what Islamic law says on the matter.

The Grand Mufti, who is the highest official of religious law in Saudi Arabia, as well as the head of the Supreme Council of Islamic Scholars, cited the Prophet Mohammed, who said the Arabian Peninsula is to exist under only one religion.

The Sheikh went on to conclude that it was therefore necessary for Kuwait, being a part of the Arabian Peninsula, to destroy all churches on its territory.

The biggest forum for sex trafficking of under-age girls in the United States appears to be a Web site called Backpage.com.

This emporium for girls and women - some under age or forced into prostitution - is in turn owned by an opaque private company called Village Voice Media. Until now it has been unclear who the ultimate owners are.

That mystery is solved. The owners turn out to include private equity financiers, including Goldman Sachs with a 16 percent stake.

Goldman Sachs was mortified when I began inquiring last week about its stake in America's leading Web site for prostitution ads. It began working frantically to unload its shares, and on Friday afternoon it called to say that it had just signed an agreement to sell its stake to management.

Al-Qaeda fighters have returned to Afghanistan and will use the country as a base to launch September 11-style attacks on Western cities, according to the American ambassador to Kabul.

Ryan Crocker told The Daily Telegraph that if the West was to leave Afghanistan too early, al-Qaeda would be able to increase its presence.

With the US preparing to withdraw the majority of its combat forces from Afghanistan next year, Mr Crocker warned: "If we decide we're tired, they'll be back.

"Al-Qaeda is still present in Afghanistan. If the West decides that 10 years in Afghanistan is too long then they will be back, and the next time it will not be New York or Washington, it will be another big Western city."

Mr Crocker, 62, who previously served as ambassador to Iraq, said that while progress had been made, Afghanistan would need Western support for years to come.

Nato officials believe that up to 100 al-Qaeda fighters have returned to the country, based mainly in the Kunar and Nuristan provinces near the border with Pakistan. Hundreds more are based in Pakistan and could return if circumstances were to change.

Manhattan - Overcoming an initially "skeptical" federal judge, opponents of the 2012 National Defense Authorization Act - which allows the military to indefinitely detain anyone it suspects "substantially supported" al-Qaida, the Taliban or "associated forces" - brought strong arguments Thursday to a case once believed to be quixotic.

Prominent writers and activists - led by Pulitzer Prize-winning journalist Chris Hedges - met in court for the first time for a hearing challenging the law, which President Barack Obama signed on New Year's Eve. The bill is also known as the Homeland Battlefield law.

Buried within the 565-page statute, opponents said, is a short paragraph that makes political activists and muckraking journalists susceptible to indefinite military detention for exercising free speech.
Section 1021 (b)(2) allows the military to detain anyone it suspects "substantially supported" al-Qaida, the Taliban or "associated forces," and to keep them detained until "the end of hostilities."

Hedges and others claim those words are so vague they could justify indefinite detention of political dissidents without due process.

The government will be able to monitor the calls, emails, texts and website visits of everyone in the UK under new legislation set to be announced soon.

Internet firms will be required to give intelligence agency GCHQ access to communications on demand, in real time.

The Home Office says the move is key to tackling crime and terrorism, but civil liberties groups have criticised it.

Attempts by the last Labour government to take similar steps failed after huge opposition, including from the Tories.

A new law - which may be announced in the forthcoming Queen's Speech in May - would not allow GCHQ to access the content of emails, calls or messages without a warrant.

But it would enable intelligence officers to identify who an individual or group is in contact with, how often and for how long.

Chinese police have arrested six people and shut 16 websites after rumours were spread that military vehicles were on the streets of Beijing, officials say.

The web posts were picked up last week by media outlets around the world, amid uncertainty caused by the ouster of top political leader Bo Xilai.

The State Internet Information Office (SIIO) said the rumours had a "very bad influence on the public".

Two popular microblogs have temporarily stopped users from posting comments.

The two sites, Sina Weibo and Tencent Weibo, are still letting people post to their own sites. But they said commenting on other people's posts would be disabled between 31 March and 3 April, so they "could act to stop the spread of rumours".

A spokesman for the SIIO told state news agency Xinhua earlier that the two websites had been "criticised and punished accordingly".

He added that that a number of other people had been "admonished or educated".

The family of Mohamed Merah, whom French police accused of carrying out a wave of deadly shootings in Toulouse and Montauban between March 11 and 19, has emphatically denied that he was a terrorist or carried out the killings. Merah was killed by an elite police unit after a 32-hour siege of his flat last Thursday.

His half-brother Rachid Merah, who lives in Algeria, told FranceInfo television: "I have no idea of what the media and the politicians are talking about. They say that Mohammed has been in Afghanistan and Pakistan and that he was in contact with Al Qaeda. But I categorically deny it. And I doubt whether he has had any links with Al Qaeda or the Taliban or any terrorist organisation in the world. And proof of that is that France killed him before he could speak in court, when they could have caught him alive."

Rachid Merah's comments come after similar questions were raised by police experts, such as Claude Prouteau of the Intervention Group of the National Gendarmerie (GIGN), who noted that the special police unit that killed Merah could easily have captured him alive. Instead, the police stormed Merah's flat and killed him in a hail of nearly 300 bullets. During the siege, Interior Minister Claude Guéant nonetheless had asserted that everything would be done to capture Merah alive, so he could stand trial.

Commenting on the weapons and videos of the shooting that police reportedly found in Merah's flat, Rachid Merah referred to well-publicized reports that Merah was functioning as an informer for French intelligence: "But as for the weapons we can suppose that he was manipulated by the French secret services, because he was young and easily influenced. They could well have bought him. They used him then they killed him. All scenarios are possible. Who can prove that Mohamed Merah filmed the videos [of the shootings] himself? It could well be someone else."

Israeli troops shot dead a Palestinian protester in Gaza on Friday as thousands in the Palestinian territories, Israel and neighboring countries participated in an annual protest against the Jewish state's land policies.

Security forces in riot gear deployed in high numbers along the frontiers of Israel and the Palestinian territories in anticipation of a repeat of last year's violence, in which at least 38 people died near the borders with Lebanon and Syria.

But for the most part, protests were small and organizers kept demonstrators from actually marching on the borders.

The "Land Day" rallies are an annual event marked by Israeli Arabs and Palestinians in the West Bank andGaza who protest what they say are discriminatory Israeli land policies.

Gaza health official Adham Abu Salmia said Israeli forces shot and killed Mahmoud Zaqout, 21, and critically wounded another man as they were approaching the Israel-Gaza border during a demonstration of a few thousand people organized by the territory's Hamas rulers.