Officials in Pakistan say a suicide bomber struck the convoy of a hardline Pakistan politician, killing at least 12 people in the second attack on the politician in two days.
They say the politician, Maulana Fazlur Rehman, was unharmed in Thursday's attack in the town of Charsadda. Rehman is the leader of the Jamiat Ulema Islam party.
At least 20 people were wounded in Thursday's blast. At least one of the dead was a police officer.
Wednesday, a bomber on a motorcycle blew himself up near a police checkpoint just after Rehman had passed through the area. The incident took place in the town of Swabi, about 70 kilometers northwest of the capital, Islamabad.
The bomb killed at least 12 people and wounded more than 15 others, although Rehman was not harmed.
No group has claimed responsibility for the attacks.
Taliban and al-Qaida-linked militants launch almost daily attacks across northwest Pakistan and the tribal areas, which Washington has branded the most dangerous place on Earth.