Sudan has accused neighboring Chad of a cross-border attack earlier this week that a top commander says killed at least 18 nomads in Sudan's western Darfur region.

According to Sudan’s ruling sovereign council, armed Chadian assailants crossed into West Darfur province and attacked a group of nomads staying in an open area near the border towns of Beir Saliba and Ardeiba last Thursday.

Apart from those killed, several nomads were also wounded in the attack and their livestock was looted and taken to Chad, the council said Friday.

There was no immediate comment from Chad on the accusations.

A Sudanese outlet, Darfur 24 news, reported a minor clash Friday between Chadian and Sudanese forces in the area, saying three Sudanese troops were wounded.

Senior Sudanese Gen. Mohammed Hamdan Dagalo, the deputy head of the sovereign council, had travelled to Chad before the attack for a previously scheduled meeting Thursday with Chad’s acting president and head of the country’s ruling transitional military council, Mahamat Idriss Deby.

Read: Sudan says 31 killed in tribal clashes in Blue Nile province

He then returned to Darfur where he has resided for weeks to help defuse tribal tensions and violence that has rocked the troubled region in recent months.

Dagalo attended the funerals of the slain nomads on Friday and urged tribal leaders and residents in West Darfur for restraint. On Saturday, he met with a Sudanese-Chadian joint committee and held talks with local officials and tribal leaders to prevent a further escalation.

Sudan has called on Chad to find the attackers and return the looted livestock.