Hundreds of thousands turned out across Egypt for pro-army demonstrations but clashed with counter protests

At least 70 people have died in clashes as supporters of ousted President Mohammed Morsi also lined the streets

Morsi has been formally accused of conspiring with Palestinian group Hamas and of murdering prison officers

More than 100 people are believed to have been killed at a protest in support of Egypt's ousted President Mohammed Morsi.

Security forces are reported to have started shooting demonstrators shortly before pre-dawn morning prayers at a round-the-clock vigil in Cairo being staged by backers of Morsi, who was removed from power by the army three weeks ago.

Makeshift field hospitals around the area near the Rabaa al-Adawiya mosque were overwhelmed, with one doctor telling the BBC that more than 1,000 had been injured.

The state health ministry said 20 people had died and 177 suffered injuries.

Followers: This image released by the Egyptian army of Friday evening's pro-army rally shows the strength of support for the security forces and against the ousted president Morsi

Makeshift: An injured man is rushed through the crowds to a field hospital on the back of a moped
Senior Brotherhood politician Saad el-Hosseini said: 'I have been trying to make the youth withdraw for five hours. I can't. They are saying have paid with their blood and they do not want to retreat.'

Egypt's army-installed interior minister, Mohamed Ibrahim, said on Friday that the month-old Cairo vigils by Morsi supporters would be 'brought to an end, soon and in a legal manner', state-run al Ahram news website reported.

Yesterday the country's new rulers accused Morsi of conspiring with the Palestinian Islamist group Hamas and plotting to attack police stations, army officers and prisons during the 2011 uprising against former president Hosni Mubarak.

During the 2011 struggles, he had escaped from a prison and has now been accused of the 'premeditated killing of officers, soldiers and prisoners'.

The announcement by prosecutors of the investigation against Morsi is likely to pave the way to a formal indictment and eventually a trial.

It was the first news of his legal status since he was deposed by the military on July 3. Since then, the Islamist leader has been held incommunicado in a secret location.

Besides Morsi, five other senior figures from the group have been detained. Hassan Mohammed, a 30-year old teacher who came from southern Egypt to join the pro-Morsi rally, remained steadfast.

'Even if we are going to die, me and my family, we won't leave this place before our president comes back. Even if it takes seven years. We are ready to be martyrs in the name of religion and the nation,' he said.