US warplanes have conducted massive airstrikes near the Libyan city of Sirte against Islamic State members believed to be planning attacks in Europe, in an attack which killed 80 people.

A month after the US military declared a successful conclusion to a months-long air campaign against the militant group, B-2 bombers made a 9,400km (5,800-mile) journey on Wednesday night from a Missouri airbase to target what Pentagon officials described as two Isis training camps 45km (28 miles) south-west of Sirte. Initial US estimates were that approximately 80 people were killed, who the Pentagon described as Isis fighters.

Analysts say the US airstrikes are proof that many Isis formations remain in Libya’s desert interior, taking advantage of the country’s chaotic civil war, and are likely to target nearby oil fields.

Read more: The Guardian