A mine blast targeting police van in Taliban hotbed Kandahar province in southern Afghanistan left two policemen dead and injuring two other police officers including district police chief, Interior Ministry said in a statement on Saturday. 'A mine blast targeted a police van in Sra Khundi area of precinct eight in Kandahar city the capital of Kandahar province on Friday as a result two policemen were martyred and two other officers including police chief of precinct eight were injured,' the statement added. Kandahar the spiritual center of Taliban militants has been experiencing security incidents almost daily since the hard-liner militia announced to launch a spring offensive against the Afghan government and NATO-led forces early May this year. Taliban militants have yet to make comments. Despite the presence of over 130,000-strong NATO and U.S. forces stationed in Afghanistan the insurgency has been on constant rise in the militancy-hit country. 