Bom explodes at Red Cross office in Pakistan; 4 vehicles damaged but no one injured

(AP) A bomb explosion at an office of the International Committee of the Red Cross in northwestern Pakistan damaged four vehicles, but no one was hurt, police said Saturday.

It wasn't immediately clear who was behind the early Saturday attack at the office of the aid agency in Peshawar, the capital of the North West Frontier Province bordering Afghanistan. Iftikhar Khan, the city police chief, said they were still investigating.

"Some one threw the explosive device at the ICRC office, but it didn't cause any casualties as the office was closed at the time," he said.

Khan provided no further details.

No ICRC spokesman was immediately available for comment.

Pakistan is a key ally of the United States in its war on terror, and offices of international aid agencies and westerners have been attacked in this Islamic nation after the Sept. 11, 2001, attacks in Washington.