At least one policeman was killed and six persons injured in a suicide attack after a political rally in Pakistan's restive north-west, police and aid workers said, dpa reported.
The incident occurred in the Charsada district of the militancy-plagued Khyber-Pakhtunkhwa province.
Nisar Marwat, senior district police officer, said that a suicide bomber targeted the vehicle of Aftab Khan Sherpao, a former interior minister, as he left, after addressing a political gathering.
"One policeman was killed and six persons, including two policemen, were injured, but the former minister remained safe," Marvat said.
Mujahid Khan of Edhi ambulance service said that two provincial lawmakers, including a son of Sherpao, were among injured.
Sherpao, who heads the Pakistan People's Party-Sherpao, a breakaway faction of the ruling Pakistan People's Party, was minister under former military ruler Pervez Musharraf and has already survived at least two suicide attacks in recent years.
"These attacks have become part of my life, but I am not afraid of them," Sherpao told media representatives after the attack.
Taliban militants based in Mohmand, one of seven tribal districts, took responsibility of the attack.
These militants regularly target their opponents. At least five people were killed Monday when a bomb attached to a motorbike exploded near a political rally of the Awami National Party in Nowshera, some 36 kilometers north-east of the provincial capital, Peshawar.