Gunmen on a motorcycle killed a Shiite Muslim university director and his driver in Gujrat, eastern Pakistan, in a possible sectarian attack, police said.

Police officer Nazir Asif Rizvi said Shabbir Shah and his driver were killed on Tuesday as he was heading to work at the University of Gujrat. He said they are still investigating the incident.

Sectarian violence between Sunni and Shiite Muslims has flared in northern Pakistan in recent days.

Ten people were killed when the two sects clashed in Rawalpindi on Friday. Three more people were killed on Monday in Kohat city.

Authorities responded by deploying troops and imposing curfews in the affected areas. A Taliban spokesman has vowed to avenge Sunnis killed in the clashes.