People and security forces are seen from inside the Great Prophet Mosque as they gather at the scene of a suicide car bomb attack in Kirkuk, 290 kilometers north of Baghdad, Iraq, Friday, March 29, 2013. AP Photo/ Emad Matti
A suicide bomber blew up a tanker truck at police headquarters in the Iraqi city of Tikrit on Monday, killing seven people and wounding 11, police and medics said.