Washington: Four Americans were killed in an attack on Bagram air base by insurgents in Afghanistan, a US defence official said.

The report of casualties came hours after the Taliban insurgency announced it would enter into peace talks with the Afghan government and the US. On Tuesday, Afghan forces took control of security across the country, marking a major milestone as US-led combat troops prepare to withdraw after 12 years of fighting the Taliban.

There were no further details of the attack at Bagram, a sprawling base about 30 miles (47 kilometres) north of Kabul that serves as a major hub for US aircraft.

The US military's presence in Afghanistan is roughly 66,000 troops, after having reached a peak of about 100,000 forces.

(Agencies)

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