Many families on Wednesday fled from a Khartoum suburb where Sudanese army shelling killed 19 civilians on Tuesday evening.

The flight adds to the over 2.8 million people who have already fled the capital of Sudan, which had a pre-war population of about five million, since the conflict between the Sudanese Armed Forces and the paramilitary Rapid Support Forces (RSF) started on April 15.

"Hundreds of families are fleeing Ombada," a district of Omdurman, Khartoum's sister city across the Nile, a resident of the area said. The person asked for anonymity because of security reasons.

Another resident, declining to be identified, told AFP, "combat has intensified since Tuesday" and included air strikes on Wednesday.

RSF fighters rule the city's streets while the Sudanese Armed Forces (SAF) command the sky over Khartoum and have conducted frequent airstrikes.

The Ombada resistance organization claimed that the army had "bombarded the paramilitaries with artillery and drones" on Tuesday night.

"These rounds missed their targets and 19 civilians were killed," the committee added in a statement on Facebook.

These committees, which formerly organized pro-democracy demonstrations, now offer various community support services and relief throughout the conflict.

For years, the RSF has maintained bases in residential neighborhoods.

However, the paramilitaries were accused of occupying "civilian homes, private businesses, and public buildings" throughout the conflict by the United States and Saudi Arabia, who had previously negotiated fruitless ceasefires. Some of these structures were looted.

The SAF "would still be required to ensure that civilian harm is minimised regardless of whether a target has been made a legitimate military target," according to the US-supported Sudan Conflict Observatory.