A bomb exploded in a bustling food market in Lahore on Wednesday, killing one person and wounding 13 others, officials said.

The blast hit Anarkali bazaar in the old city area of Lahore, Pakistan's second-largest city and capital of relatively peaceful Punjab province.

Doctor Tahir Bilal told AFP that one dead body and 13 injured have been brought to Lahore's Mayo Hospital.

"Condition of some of those wounded is critical," Bilal said, adding that one woman was among the injured.

Senior police officer Rai Tahir confirmed the death toll and said the bomb appeared to have been a relatively low-powered device.

TV footage showed broken tables and chairs outside a a small restaurant in the street of food shops and stalls, where a bombing in July killed five people and wounded 50 others.

That attack was the worst bombing in Lahore since a teenage suicide attacker targeted a Shiite Muslim religious procession on January 25, 2011, killing at least nine people.

There was no immediate claim of responsibility for the blast.