The Taliban claimed responsibility for the attack in Kapisa province, saying the terror organization was trying to target U.S. troops, said Mehrabuddin Safi, the governor of the eastern province.
MORE: http://www.cnn.com/2013/01/25/world/meast/afghanistan-violence/index.html?hpt=ias_c2
See also...
Taliban attackers storm police office in Afghan capital
http://www.cnn.com/2013/01/21/world/asia/afghanistan-violence/index.html
Soldier killed when insurgents hit Afghan security agency office in Kabul
http://www.cnn.com/2013/01/16/world/asia/afghanistan-violence/index.html