At least three people are reported to have died and some 80 have been hurt after soldiers fired on crowds opposing a military takeover in Sudan.
Protestors took to the streets after the armed forces dissolved civilian rule, arrested political leaders and called a state of emergency on Monday.
Troops are reported to have been going house to house in the capital Khartoum arresting local protest organisers.
The coup has been condemned around the world, and the US halted $700m in aid.
The leader of the coup, Gen Abdel Fattah Burhan, blamed political infighting for the military action.
Civilian leaders and their military counterparts have been at odds since long-time ruler Omar al-Bashir was overthrown two years ago.
As night fell on Monday, large numbers of protesters were on the streets of Khartoum - and other cities - demanding the return of civilian rule.
One wounded protestor told reporters he was shot in the leg by the army outside the military headquarters, while another man described the military firing first stun grenades, then live ammunition.
"Two people died, I saw them with my own eyes," said Al-Tayeb Mohamed Ahmed. Sudan's doctors' union and the information ministry also wrote on Facebook that the fatal shootings had happened outside the military compound.
Pictures from a hospital in the city showed people with bloodied clothing and various injuries.
Our correspondent says that despite the violence, the protests show few signs of easing.
Demonstrators have blocked roads with piles of bricks and burning tyres. Many women are also taking part, shouting "no to military rule".
The city's airport is closed and international flights are suspended. The internet and most phone lines are also down.
Central Bank staff have reportedly gone on strike and across the country, doctors are said to be refusing to work in military-run hospitals except in emergencies.
