Warplanes have carried out air strikes on an Islamic State (IS) training camp in the western Libyan city of Sabratha, killing as many as 40 people, the city's mayor says.
The New York Times, citing a Western official, said US jets carried out the attack early on Friday morning (local time).
Hussein al-Thwadi told Reuters the planes hit a building in the Qasr Talil district in which foreign workers were living.
He said 41 people had been killed and six wounded. The death toll could not immediately be confirmed with other officials.
Sabratha is near the Tunisian border, and it is also one of the areas where Western officials say Islamic State militants had presence as part of their expansion in the North African state.
The gunmen who carried out attacks at a Tunis museum and a beach hotel in 2015, killing dozens of people, all trained at militant camps in Libya before returning to their home country.
The Western official cited by the New York Times said Friday's air strikes targeted a senior Tunisian operative linked to both of 2015's attacks, which were claimed by Islamic State.