Four militants of the Islamic State (IS) had been killed in a U.S. drone strike in Afghanistan's eastern province of Nangarhar, the provincial government said on Saturday.

"The drone strike occurred in Kamkai village, Achin district late on Friday. The bombing also destroyed a heavy gun of the IS fighters, but caused no casualties among the villagers," it said in a statement.

The Afghan security forces have beefed up security operations against militants recently as spring and summer known as fighting seasons are drawing near in the country.

Achin district bordering Pakistan has been the scene of heavy clashes between IS militants and security forces backed by pro-government local militiamen over the past couple of months.

The militant group has yet to make comments.

Source: XINHUA