A suspected drone attack by Sudan's Rapid Support Forces (RSF) paramilitary has killed at least 11 people at a displacement camp in River Nile state, authorities said. In a statement late on Friday, the local governor said the attack knocked out a nearby power station for the fourth time since the war between the RSF and the Sudanese army began two years ago. The attack marks a deadly escalation in the ongoing conflict, with a further 23 people injured, a medical official said. Witnesses said at least nine children were among the wounded. "My son, my cousin, my daughter's husband and two children, my cousin's children are dead. The boy is 10 years old and the girl is about two years old," witness Haleema told Al Jazeera.