Officials of the International Security Assistance Force in Kabul say they were deliberately targeted late Sunday when two rockets were fired at their facilities.

ISAF officials who are responsible for security in the capital say the two 122 millimeter rockets fired into Kabul Sunday were aimed directly at their facilities.

One of the rockets hit a dormitory building at ISAF headquarters and the other landed harmlessly near the Kabul military training center where ISAF has a base.

ISAF's spokesman, German Army Colonel Thomas Lubbering says the attacks were well planned.

"This is a significant difference from the type of attacks that we have experienced so far," he said. "It is far more sophisticated."

There has been no claim of responsibility for the attacks, which caused no injuries and little damage. ISAF officials say they believe Hezb-e-Islami operatives loyal to renegade warlord Gulbiddin Hekmatyar were behind the attack.