US warplanes carried out airstrikes early on Friday morning in the western Libyan city of Sabratha, where the self-styled Islamic State militants operate, killing as many as 40 people.
A US military spokesman said the attacks targeted a senior Tunisian militant linked to attacks in Tunisia last year.
Sabratha’s mayor, Hussein al-Thwadi, told Reuters the planes struck at 3.30 a.m. (0130 GMT), hitting 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.
Tunisian security sources have said they believe Tunisian IS fighters have been trained in camps near Sabratha, which is close to the Tunisian border.
Two major attacks in Tunisia last year claimed by IS—one on a Sousse resort hotel and another on a Tunis museum—were carried out by gunmen who officials said had trained in Libya.
The New York Times earlier reported that Friday’s airstrikes targeted a senior Tunisian operative, Noureddine Chouchane, connected to both of last year’s attacks.
The mayor said officials visited the site of the strike and found weapons in the building, but he did not give any further details.
“Some Tunisians, a Jordanian and two women were among the dead,” he said.
Several Tunisians who had recently arrived in Sabratha were among survivors.
Since Libyan leader Muammar Gaddafi was overthrown in 2011, the north African country has slipped deeper into chaos with two rival governments each backed by competing factions of former rebel brigades.
As IS has expanded in Libya, taking over the city of Sirte and attacking oil ports, so too have calls increased for a swift western response to stop the group establishing a base outside its Iraq and Syria territory.
Western officials and diplomats have said airstrikes and special forces operations are possible as well as an Italian-led “security stabilization” plan of training soldiers.
American and European officials insist Libyans must invite help through a united government, but say they may still carry out unilateral action if needed.
Last November, the United States said it carried out an airstrike on Libya’s Derna to target Abu Nabil, also known as Wissam Najm Abd Zayd al-Zubaydi, an Iraqi commander of IS.
