Islamabad: Gunmen opened fire on a vehicle carrying four Shiite Muslims in northwestern Pakistan on Tuesday, killing them all, officials said. It was unclear whether the attack was sectarian.

It was not immediately known who killed the men as they drove through the town of Hangu, local police official Umar Hayyat said. Police were investigating, he said.

Ghani ur-Rahman, Hangu's former mayor, said the four men were money changers, but the motive behind the attack was not clear.

Hangu and other towns in northwest Pakistan bordering Afghanistan have seen many sectarian attacks recently. On Monday, a bomb exploded at a Shiite mosque in the town of Dera Ismail Khan, killing four worshippers.


Scores of people have reportedly died in months of intermittent fighting between Sunni and Shiite Muslims in Kurram, a mountain valley next to the frontier.

Minority Shiites and majority Sunnis generally live in peace in Pakistan, but extremists on both sides often target each other's leaders and activists.