ISLAMABAD, Pakistan (AP) – A powerful bomb ripped through a bus carrying employees from the armed forces, while a device tied to a motorcycle went off in a commercial district near Pakistan’s capital Tuesday, authorities and local media said. At least 15 people were killed in the blasts.

The first bomb exploded on a bus traveling through Rawalpindi, a garrison city about seven miles southwest of Islamabad, killing at least 10 people, army spokesman Maj. Gen. Waheed Arshad said.

Mohammed Afzal, an area police official, said the 72-seater bus belonged to the Pakistan army and was destroyed in the blast. Arshad didn’t that the bus belonged to the army.

“I am not in a position to give you any such information at this stage,” he told The Associated Press.

As the ambulances were transporting victims from the bus blast, a second bomb went off in one of Rawalpindi’s commercial districts, killing at least five people, Afzal said.

He said the dead and injured had been transported to two different hospitals.

Afzal didn’t provide any information about those who were killed or injured in the second blast.

“We only know that it was a motorcycle bomb. It exploded with a big bang and killed at least five people.”

Pakistan is a key ally of the U.S. in its war on terror. It has witnessed scores of bomb attacks and other acts of terrorism since the Sept. 11 attacks in the U.S. Officials have blamed pro-Taliban and al-Qaida elements for most of the attacks.