Mustafa Noah, Libya’s spy chief, reported kidnapped

No group has yet claimed responsibility for the kidnapping of Libya's deputy intelligence chief Mustafa Noah, as the troubled nation attempts to reign in militia rule and push back hardline Islamists in the wake of Muammar Gaddafi's violent ousting.

"The vice president of intelligence was abducted shortly after his arrival in Tripoli from a trip abroad," an unidentified official told Al Jazeera on Sunday.

Two unidentified security sources told Reuters that Noah had been kidnapped outside an airport in Tripoli.

The kidnapping follows ongoing clashes between militia groups and protesters. Dozens have been killed since Friday. It's unclear if the two events are connected.

Militas have kidnapped officials before. Last month, a government-backed militia group kidnapped Prime Minister Ali Zeidan, though the group let go the prime minister a few hours later.