Blast kills 4 in Pakistan March 14, 2012 -- Updated 1220 GMT (2020 HKT) Four people were killed, three were wounded, a government official said The attack took place in Pakistan's Bajaur Agency Islamabad, Pakistan (CNN) -- Four people were killed and three others were wounded Wednesday in a blast caused by a remote-controlled explosive device in tribal Pakistan, a government official said. The explosion struck a car of civilians traveling along a dirt road in the Mamund area in Bajaur Agency, according to Jamil Khan, an agency official. Bajaur is one of seven semi-autonomous tribal districts in northwest Pakistan.