More than 100 people have been killed at a protest by supporters of ousted Egyptian President Mohammed Morsi in the capital Cairo, doctors say.
BBC – They said more than 1,500 were also hurt. The state health ministry says 38 people died and 180 were injured.
The army ousted Mr Morsi on 3 July. He has been formally accused of murder relating to a 2011 jail outbreak, and of links to the militant group Hamas.
Pro- and anti-Morsi supporters staged huge protests overnight in the capital.
The anti-Morsi occupied Cairo’s Tahrir Square in support of the army, after its chief, Gen Abdel Fattah al-Sisi, had urged people to demonstrate to provide a mandate for its intervention.
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Meanwhile, tens of thousands of Morsi supporters continued their sit-in protest at the mosque in the Nasr City area.
On Saturday, Interior Minister Mohammed Ibrahim vowed to end the sit-in, saying local residents had complained about the encampment.
He said the protest would be “brought to an end soon and in a legal manner” with an order from the prosecutor, although this has yet to happen.
The BBC’s Jim Muir in Cairo says the latest violence is the most serious since the army’s intervention to remove President Morsi, but this does not appear to have been a planned campaign to clear the area around the mosque.
It appears the violence began after some of the Morsi supporters tried to block a main road in the area overnight and security forces responded.
The health ministry issued a lower death toll of 38, with 180 people wounded.
State news agency Mena quoted a security official as saying that live fire had not been used, only tear gas.
The official said security forces had been trying to stop fighting between rival sides and that eight security personnel had been injured.
But Muslim Brotherhood spokesman Gehad el-Haddad told Reuters news agency: “They are not shooting to wound, they are shooting to kill.”
Our correspondent says medics at the hospital believed about 70% of the casualties were caused by live fire – with many of the victims hit in the chest or head by snipers firing from rooftops.
A senior Brotherhood politician, Saad el-Hosseini, told the agency that this was an attempt by security forces to clear the mosque area.
“I have been trying to make the youth withdraw for five hours. I can’t. They are saying they have paid with their blood and they do not want to retreat,” he said.
Our correspondent says Morsi supporters are furious about the role the military is taking, and in particular Gen Sisi, who they say is killing Egyptians.