Rebels in Darfur have demanded that peacekeepers from China pull out of the Sudanese region just hours after the arrival of 135 Chinese engineers.

The army engineers arrived on Saturday to prepare for a joint UN and African Union peacekeeping force of 26,000.

The key Justice and Equality Movement (Jem) rebel group accuses China of being complicit in the Darfur conflict.

Last month the group attacked a Chinese-controlled oilfield, kidnapping several workers.