KHARTOUM, Sudan (AP) — Sudanese activists said on Monday that at least 11 people were killed in clashes with security forces during mass demonstrations demanding a transition to civilian rule.

Tens of thousands of Sudanese flooded the streets of the capital, Khartoum, and other areas on Sunday in the biggest protests since security forces cleared a sit-in last month. They called for the military to hand over power to civilians following the coup that ousted longtime autocrat Omar al-Bashir in April.

Nazim Sirraj, a prominent activist, told The Associated Press on Monday that three bodies were found next to a school in Omdurman, the twin city of Khartoum. The three were shot dead in an area where security forces had barred protesters from marching toward a hospital and had fired tear gas to disperse them, he said. One wounded person died on the way to the hospital in Khartoum, he added.

Sirraj said the total death toll was 11, including one killed in the city of Atbara, a railway hub north of Khartoum and the birthplace of the December uprising that eventually led to al-Bashir’s ouster.

The Sudan Doctors Committee, the medical arm of the Sudanese Professionals’ Association, which has spearheaded the demonstrations, confirmed the death toll.

Authorities said late Sunday that at least seven people were killed and nearly 200 wounded, including 27 wounded by bullets during the demonstrations.

The ruling military council blamed protest leaders for the deaths after they diverted the routes of their marches.

Lt. Gen. Gamal Omar, a member of the council, said in a statement that it was regrettable that the Forces for Declaration of Freedom and Change, which represents the protesters, diverted marches toward the presidential palace and the military headquarters.

He said security forces used tear gas to disperse protesters, who hurled stones at them.

He said the paramilitary Rapid Support Forces arrested “elements” who fired at security forces in Omdurman, killing two people and wounding three RSF members. Omar said over two dozen security forces were wounded across the county.

Protest leader Mohammed al-Asam said they would continue in their “revolutionary acts” till the military hands over power to civilians.

“The military council has only one option, which is to respond to demands of the Sudanese people,” he said in a video clip posted on the SPA Facebook late Sunday.

The protests came amid a weekslong standoff between the ruling military council and protest leaders. Talks between the two sides over a power-sharing agreement collapsed when security forces violently broke up a protest camp in Khartoum on June 3.

The ensuing clampdown resulted in at least 128 people killed across Sudan, according to protest organizers. Authorities put the death toll at 61, including three security forces.

In a statement late Monday, the FDFC called for a regionally-backed investigation to probe the crackdown since al-Bashir’s ouster on April 11.

It also demanded an “immediate” transfer of power to a civilian-led transitional government, that would include a cabinet, legislative body and a sovereign council — the last composed of civilian and military members with limited symbolic powers.