At least four members of the Afghan security forces were killed and 20 others were injured as a car bomb exploded near the gate of a building in Ab Band district of Afghanistan's eastern Ghazni province on Saturday, according to Tolo news. 

A suicide bomber driving a car full of explosives targeted a building of the district governor and detonated the vehicle at around 4:30 a.m., Tolo News reported.

Taliban has claimed responsibility, it added.

Ghazni Police Chief Khalid Wardak told Tolo News that toll might rise.