Fighting in the Sudanese capital raged into the early hours of Sunday after a day of deadly battles between paramilitaries and the regular army that left at least 56 people dead and nearly 600 wounded.
Explosions and gunfire rang out on the deserted streets of Khartoum, according to witnesses, after the paramilitaries said they were in control of the presidential place, Khartoum airport and other vital facilities.
The army denied the claims, and in a statement late Saturday, the Sudanese air force urged people to stay indoors as it continued air strikes against bases of the paramilitary Rapid Support Forces (RSF).
Fighter jets were earlier seen flying overhead.
Windows rattled and apartment buildings shook in many parts of Khartoum during the clashes, according to AFP correspondents, with explosions heard early Sunday.
"The total number of deaths among civilians reached 56," said the Central Committee of Sudan Doctors, an independent pro-democracy group of medics, adding there were "tens of deaths" among security forces but they were not included in the new toll early Sunday.
The committee said it had counted around 600 wounded including some among security forces and that many casualties could not be transferred to hospitals due to difficulties in moving during the clashes.
Saudi Arabia's flag carrier Saudia said earlier one of its planes, with passengers and crew aboard waiting for departure, was "exposed to gunfire damage".