Aircraft attacked a convoy carrying suspected Islamic State militants near the northwestern Libyan town of Bani Walid early on Sunday, an official said.
No group claimed responsibility for the attack though both the United States and Libyan government forces have launched air strikes on jihadists in recent months.
Three huge explosions rocked the area around dawn, the member of Bani Walid's municipal council told Reuters.
People living in Ras al-Tbel, about 80 km south-east of Bani Walid, had seen the same convoy of up to 15 vehicles carrying the black flags of Islamic State over the past two days, the official added.
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