The number of people killed in a crackdown on pro-democracy protests in the Sudanese capital Khartoum has risen to 60, an opposition group says.
Members of a feared paramilitary group are reported to be roaming the streets attacking civilians.
The violence began when forces of the Transitional Military Council (TMC) opened fire on unarmed protesters on Monday.
The military has faced international condemnation for the attack BBC said.
An attempt at the UN Security Council to condemn the violence was blocked on Tuesday by China, backed by Russia.
Demonstrators had been occupying the square in front of the military headquarters since 6 April, days before President Omar al-Bashir was overthrown after 30 years in power.
Their representatives had been negotiating with the TMC and had agreed on a three-year transition that would culminate in elections.
But on Monday, forces swept in to remove protesters from the square.
Many Khartoum residents blamed the Rapid Support Forces for the crackdown. The paramilitary unit – formerly known as the Janjaweed militia – gained notoriety in the Darfur conflict in western Sudan in 2003.
On Tuesday the TMC announced negotiations with protesters were over, all previous agreements were canceled, and elections would be held within nine months. Demonstrators had argued that a longer period was needed to guarantee fair elections and dismantle the political network associated with the former government.
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The Central Committee of Sudanese Doctors earlier gave a death toll of 40 but revised the figure to 60 on its Facebook page on Wednesday.
Protest organisers, the Sudanese Professionals Association (SPA), accused the TMC of carrying out “a massacre” and urged its supporters to continue protesting peacefully.
One Khartoum resident, who declined to be named, told the BBC that people were living in fear as reports of atrocities spread.
“We have reached the point where we can’t even step out of our homes because we are scared to be beaten or to be shot by the security forces,” she said.
Her uncle had witnessed three young men being executed in the city, she said.
Another resident, who also asked not to be named, told the BBC he was pulled from his car by members of the Janjaweed and beaten on his head and back.
Large numbers of heavily armed troops were also reported on the streets of Omdurman, Sudan’s second-largest city, just across the River Nile from Khartoum.
A woman, identified only as Sulaima, told the BBC that troops from the Rapid Support Forces were “all over Khartoum”.
“They’re surrounding neighbourhoods, they’re threatening people. They’re also using live ammunition. They’re everywhere. We’re not feeling safe and we don’t have trust in the security forces. It’s complete chaos.”
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