Afghan officials say fierce fighting has erupted between government security forces and Taleban rebels a day after U.S. airstrikes killed as many as 20 suspected militants in southern Afghanistan.

Gunbattles early Monday have left 11 Taleban guerillas dead, along with a local government official and a member of Afghanistan's security force.

On Sunday, the U.S. military said it had killed 15 to 20 suspected Taleban fighters in an airstrike after coalition forces came under small arms and rocket fire.

Violence in the south and east regions of Afghanistan has increased in the last three months.

Some information for this report provided by AP and Reuters.