A suicide bomber blew himself up in a market in north-west Pakistan on Wednesday, killing at least 15 people.
The blast took place close to Pakistan’s border regions with Afghanistan, where Islamist militants are strong.
City police chief Dilawar Khan Bangash said several people were wounded.
The target of the blast was unclear. The market was close to a bus station where people were gathering to return home to the border region.
Islamist militants seeking to overthrow Pakistan’s broadly pro-Western government have carried out scores of bombings in recent years, mostly against Western or government targets. The army has responded with offensives in some parts of the north west.
Shad Ali, a doctor who heads the health administration in the town of Kohat, said 15 were killed and 25 injured.
The attack came two days after 50 people were killed in two blasts at a government compound in Mohmand, also in the border area.
A spokesman for the Pakistan Taliban, the main militant group in the north west, has claimed responsibility for that attack.