QUETTA, Pakistan -- A suicide bombing claimed by the Pakistani Taliban killed at least 54 Muslims at a procession in southwest Pakistan yesterday.

To the northwest, in Pakistan's restive tribal regions, two suspected US missile strikes killed at least seven people in an area controlled by the Taliban-allied Haqqani network, one of the main groups battling Americans in neighboring Afghanistan, Pakistani intelligence officials said.

Two other militant bombings left at least two people dead and several wounded on a day convulsed by the violence that threatens the stability of Pakistan's weak civilian government.

The first attack of the day was a roadside bombing in the northwestern city of Peshawar that killed one police officer and wounded three others, officials said.

Hours later, a suicide attack on a mosque belonging to the minority Ahmadi sect killed at least one person and wounded several others in the nearby town of Mardan.

Soon after, a blast killed at least 54 people in the southwestern city of Quetta at a Shiite procession calling for solidarity with Palestinians, Quetta Police Chief Ghulam Shabir Sheikh said. He said 78 people were wounded and several were in critical condition.

Pakistani Taliban commander Qari Hussain Mehsud said one of his militants carried out the suicide bombing.

"We proudly take its responsibility," he said. "Our war is against America and Pakistan security forces, but Shiites are also our target because they, too, are our enemies."

He said he was proud the United States had added the Pakistani Taliban to its international terrorism blacklist on Wednesday, and he threatened attacks in the United States and Europe in coming days that would resemble the recent attempted car bombing in Times Square.