Blast in centre of Pakistani city of Lahore kills 13

A suicide bomber plowed a motorcycle into a group of police escorting a protest rally in the eastern Pakistani city of Lahore on Monday, killing at least 13 people and wounding nearly 60 in an attack claimed by a breakaway Taliban faction.

The blast ripped through the crowd of hundreds of pharmacists, who were protesting new amendments to a law governing drug sales. Six police officers, including a former provincial counterterrorism chief, were among those killed, police said.

Sameer Ahmad, the Lahore deputy commissioner, said at least 13 people were killed and 58 wounded, including nine who were in critical condition.

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Live TV registered a loud bang and showed smoke and fire billowing up as people ran away, some of them carrying the wounded.

"We just couldn't understand what happened," Tufail Nabi told local Geo News TV. "It was as if some big building collapsed," he said as he limped away.

A group called Jamaat-ul-Ahrar claimed the attack in a text message, saying it was revenge for Pakistani military operations against Islamic militants in tribal regions along the Afghan border.

The group, which claimed a number of large attacks last year, including the Easter Sunday bombing in Lahore that killed 70 people, is one of several splinter factions from the Pakistani Taliban, which has repeatedly targeted security forces and religious minorities. In recent years, Pakistan has launched several offensives against the Taliban and other Islamic militants in the tribal regions.

Prime Minister Nawaz Sharif vowed to continue fighting terrorism "until we liberate our people of this cancer and avenge those who have laid down their lives for us."

Elsewhere in Pakistan, a roadside bomb killed two members of bomb disposal squad on the outskirts of the southwestern city of Quetta, said police officer Abdur Razzaq Cheema. Another eight people were wounded, he said.