Afghan officials say at least 12 civilian construction workers have been killed in airstrikes by U.S.-led coalition forces in eastern Afghanistan..

The governor of eastern Nuristan province, Tamin Nuristani, says the workers were sleeping in tents when the attack happened earlier this week. He says U.S. military officials launched the airstrikes after receiving information that Taliban insurgents were in the the area.

Coalition officials have not confirmed that any airstrikes took place, but say they are looking into the incident.

The construction workers were building a road in the remote region.

Afghan President Hamid Karzai has repeatedly pleaded with NATO and coalition troops to use more caution before conducting airstrikes, which have killed a number of civilians.

Some information for this report was provided by AFP, AP and Reuters.