Khartoum: Four people have been killed by an unexploded ordnance (UXO) blast in Sudan’s South Kordofan, the UN said on Saturday, in the latest such case after heavy fighting in the area.

“In Dilling, four people were killed when a UXO exploded while they were farming,” the United Nations Office for the Coordination of Humanitarian Affairs (OCHA) said in its weekly bulletin.

It did not say when the blast occurred but the bulletin covered the week to August 4.

Rebels from the Sudan Revolutionary Front, an alliance of groups fighting to topple the Khartoum regime, clashed with government forces near Dilling on July 27.

There has been an upsurge of rebel activity since April in the boundary region between South and North Kordofan states, through which passes the main road link to the national capital Khartoum.

In late July nine children were killed in the region when they picked up an unexploded rocket-propelled grenade which then detonated, the Nuba Reports website of “citizen reporters” in South Kordofan reported earlier.

OCHA’s bulletin cited the same incident, which happened near Abu Kershola.

In a third case, OCHA said seven people were reportedly wounded in the North-South Kordofan border area when a commercial truck they were riding in hit a landmine.

“In response, the international NGO Save the Children Sweden is expanding mine risk education programmes in these areas,” OCHA said.