A suicide bomber attacked a police checkpoint in the Pakistani city of Peshawar, killing at least nine people this afternoon. More than 27 others were injured in the attack . Local media said a car laden with explosives had been driven into the checkpoint in the Pishtakhara area and the car exploded as police went to search it. Television footage showed a large cloud of smoke and the wreckage of cars. Witnesses said the explosion was heard in the whole city and and saw injured people and police men lying in the area. It was the sixth attack in Peshawar within a week. President Asif Ali Zardari and Prime Minister Yousaf Raza Gilani have strongly condemned the attack.