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Terrorists in the skies: Over 1,100 Pakistanis were killed in unauthorized US drone attacks last year.
A non-UN sanctioned US drone attack has killed at least five people and wounded several others in Pakistan's northwest tribal area of South Waziristan, intelligence officials in the region say.

The five were killed on Sunday morning when a US drone aircraft fired two missiles at a vehicle in Azam Warsik, a militant hotbed on the Afghan border, a Press TV correspondent reported.

Meanwhile, locals said US predator drones were still hovering over the South and North Waziristan tribal regions.

The attack comes two days after two US drone attacks killed at least six people and wounded several others in North Waziristan Province near the border with Afghanistan.

The US frequently carries out such attacks on Pakistan's tribal areas. Attacks by unmanned American planes have left dozens of people dead in the volatile region over the past weeks.

Nearly 1,200 people were killed in 124 unauthorized US drone attacks in Pakistan in 2010.

The aerial attacks, initiated by former Republican US president George W. Bush, have been escalated under Democratic President Barack Obama, who had promised major changes in the American militaristic policies .

The United States claims the raids target Pakistani militants. But Pakistani officials say many civilians are also killed in the attacks.

Meanwhile, Pakistani sources have stated that the US drone strikes kill 50 civilians for every one militant.

Islamabad has frequently slammed the US over the drone strikes, saying they violate its sovereignty.

Update: Second US airstrike kills another 6 Pakistanis

Another non-UN-sanctioned US drone strike has killed at least six people and wounded several others in Pakistan's troubled northwestern tribal belt.

This is the second attack by the American drones in Pakistan's northwest regions on Sunday.

The first attack left five people dead in South Waziristan.

The US frequently carries out such attacks on Pakistan's tribal areas.

Attacks by unmanned American planes have left dozens of people dead in the volatile region over the past weeks.

Such attacks have nearly doubled under US President Barack Obama.

Some 1,200 people were killed in air attacks by the pilotless US planes in Pakistan in 2010.

Pakistan has repeatedly condemned the American drone strikes as a violation of its sovereignty.

Washington claims its warplanes target militants. But figures show most of the victims have been civilians.

The issue of civilian casualties has strained relations between Islamabad and Washington with the Pakistani government repeatedly objecting to the attacks.