Police say gunmen riding on a motorcycle have opened fire on a vehicle carrying a leader of a hard-line Sunni group in eastern Pakistan, killing him and wounding a passer-by before fleeing.

Local police official Mohammed Rafique says Shamsur Rehman, the provincial president of the Ahle Sunnat Waljamaat group, was going to his home after praying at a mosque Friday when the attackers ambushed his car in Lahore, the capital of eastern Punjab province.

No one immediately claimed responsibility. Rafique says apparently it was a sectarian attack but officers are still investigating.

Rehman's group is linked to the outlawed Sipah-e-Sahaba extremist group, which has been accused of killing thousands of Shiites in recent years.

Pakistan has suffered frequent sectarian violence between majority Sunni and minority Shiite groups.