A convoy of the United Nations peacekeepers in Darfur was shot at by Sudanese soldiers on Monday, injuring the local driver and destroying a fuel tanker, according to United Nations officials.

The peacekeepers didn’t return the fire. The troops of the UN didn’t suffer any casualties, according to the New York Times.

This is the first attack of its kind since the UN force took over last month in order to stop the violence in Darfur.

The attack was condemned by UN Secretary-General Ban Ki-Moon “in the strongest terms,” BBC News informs.

In a statement the United Nations said: “The government of Sudan has to provide unequivocal guarantees that there will be no recurrence of such activities by its forces.”

The Sudanese soldiers attacked a clearly marked UN convoy with supplies that was returning from Um Baru and was heading to Tine, in West Darfur, according to the UN officials.

Apparently the soldiers mistook the convoy for Darfur rebels, a UN peacekeeper said under condition of anonymity.

He said: “It was nighttime. It seems the soldiers lost their calm.”

According to a senior official, the Sudanese soldiers stopped to shoot after 10 minutes.

Still it was unclear how the convoy was mistaken for rebels since the UN vehicles are marked in order to show its neutrality. The rebels have camouflaged pickup trucks.

Tensions in the area escalated in the last weeks.

Violent clashes between rebels and the government forces have occurred many times.

Chad and Sudan are accusing each other for sheltering rebels.

Over 200,000 people have died since the rebellion of African groups occurred in 2003. Another 2.5 million fled to refugee camps.

Unamid (United Nations-African Union Mission in Darfur) is a force of 9,000 troops and will grow to 26,000.