At least 26 people were killed and 60 others injured in a bomb blast in a tribal region in the northwest of Pakistan on Tuesday.

The explosion took place in a market in Jamrud, which is one of the towns of the troubled Khyber tribal region. The bomb was planted in a pick-up truck. Most of the victims were passengers on the truck, local authorities said. The wounded have been taken to hospitals in Jamrud and Peshawar.

Several militant groups, including the Tehrik-e-Taliban Pakistan and Lashkar-e-Islam, are active in the region. No group has so far claimed responsibility for the blast. Recently there has been a warning from the Tehrik-e-Taliban Pakistan that it would be carrying out attacks in retaliation for operations against its fighters in the tribal belt.

This is the first major bombing in Pakistan this year. The last one was on December 30, when 13 people were killed in a bombing in the southwestern city of Quetta.