American forces conducted two airstrikes on Taliban fighters to foil the militant group's plan to launch attacks on Afghan security forces, a US military spokesman said on Friday, in a move that could hurt the peace process.

The airstrikes, conducted in two different provinces, were the first since the start of the Id ceasefire declared by the Taliban and Afghan forces last month.

Sonny Leggett, a US military spokesman based in Afghanistan, said in a tweet that an airstrike was carried out against 25 armed Taliban fighters executing a coordinated attack on an Afghan force checkpoint in Farah province in the west. He said a second attack was conducted in Kandahar in the south.

He did not give casualty figures, and a Taliban spokesman refused to comment on the airstrikes, which were conducted at a time when the US is steadily pulling its troops out of Afghanistan.

President Trump in recent weeks has restated his desire for a full military withdrawal from Afghanistan.