A car bomb exploded on a crowded street in northwestern Pakistan Sunday, killing 33 people in the third blast to hit the troubled city of Peshawar in a week, officials said.

The latest explosion appeared to have been a bomb planted in a parked car and detonated by remote control, said police officer Zahid Khan. It went off in a crowded market that is the city's oldest bazaar near a mosque and a police station, officials said.

The blast damaged the mosque and nearby shops and caused many vehicles to go up in flames, said police officer Nawaz Khan.

At least 33 people died in the blast, said Jamil Shah, spokesman for Lady Reading Hospital, while more than 70 were wounded.

Such attacks in the city, which is the provincial capital of Khyber Pakhtunkhwa province, have claimed over 130 lives since last Sunday when two suicide bombers blew themselves up in a crowd of worshippers at a church, killing 85 people.

Then on Friday 19 people died when a bomb planted on a bus carrying government employees home for the weekend exploded in the Peshawar outskirts.

The bomb that went off Sunday was some 300 meters (yards) from the All Saints Church, which was the scene of last Sunday's carnage.

A book shop owner, Nazar Ali, had just opened his shop when the bomb went off.

"It was a huge blast that was followed by fire in vehicles. Thick black smoke covered the air and splinters spread all over. I saw people lying dead and bleeding all over," he said.

Another man was shopping for breakfast when the bomb exploded.

"Suddenly there was a huge bang and I fell on the ground," said Adnan Hussain, speaking from Lady Reading Hospital where the wounded were taken. "My cousin Rizwan is dead and the other is critical."

There was no immediate claim of responsibility but the blame is likely to fall on the Pakistani Taliban and its affiliates. The militant group has been battling troops in northwestern Pakistan; their aim is to overthrow the government and establish a hard-line Islamic state across Pakistan.

The new government of Nawaz Sharif has said it would like to negotiate with the militants to end the bloodshed, but so far those efforts have made little progress and attacks like Sunday's have continued.

On Saturday, a spokesman for the Tehreek-e-Taliban criticized Sharif, saying comments by Sharif indicating that the militants must lay down their weapons and respect the constitution indicated the new leader is not serious about peace talks. Previously Sharif had not given preconditions for the talks.

"By telling us that we will have to lay down arms and respect the constitution, the prime minister, Nawaz Sharif, showed that he is following the policy of America and its allies," the spokesman said. "We will hold talks with (the government) only when it gets the real power to take decisions."