PESHAWAR (Agencies) - At least 10 people were killed and 50 injured on Monday after a suicide bomber blew up his explosives-laden car in a restive northwestern Pakistan valley, officials said. The bombing took place at a security checkpoint in the town of Mingora in the scenic Swat valley, which has been rocked by a violent campaign to impose harsh Islamic laws. "Ten people were killed and 50 others were injured in the suicide blast at the checkpost," a security official told AFP. He added that all who died were civilians and a lone security official was among the wounded. "The attacker was trying to approach the checkpost after bypassing the queue but his car exploded on the way," the official said. The chief of a local government hospital, Doctor Lal Noor, said nine bodies were brought in along with the 50 who were wounded and one of the injured died at hospital. Gunfights were also reported in several other parts of Swat valley, the official said. A soldier and a militant were killed at Qambar village near Mingora in a gunfight when militants tried to get 17 of their men released from security forces who had been arrested on Monday, he said. Separately, one militant was killed and several others were injured in a clash with troops outside Mingora, a security official said. He added that authorities on Monday imposed a curfew in Mingora which was lifted in the afternoon and that troops had launched a search operation for militants in the area. Meanwhile, President Asif Ali Zardari has strongly condemned the suicide attack at a military checkpost in Swat. In his message, President Zardari deplored the tragic incident and said the perpetrators of such heinous crime would not be spared.