It took Afghan forces nine hours to dislodge them, Interior Ministry spokesman Sediq Sediqi told the Associated Press.

BBC: Kabul police headquarters attacked

The two dead men were employees of a company that repairs police vehicles, said Interior Ministry spokesman Sediq Sediqi.

NPR: Insider Attack Kills 2 US Troops, 2 Afghans

"We have started taking the issue very seriously and have brought fundamental changes, " Sediq Sediqqi, a spokesman for the ministry, told CNN.

CNN: Were U.S. troops told to overlook Afghan abuse of boys?