Two suicide bombers killed at least 15 people and wounded more than 30 in Iraq's Tikrit city as police and soldiers were collecting their salaries at a local bank, police and hospital officials said Thursday. The attacks were the latest to target local Iraqi security forces as the last U.S. troops prepare to pull out of the country more than eight years after the invasion that toppled Saddam Hussein. One suicide bomber detonated his explosives among officers who were gathered outside the Rafidain bank in the centre of Tikrit, 150 km (95 miles) north of Baghdad, and moments later another blew up a car when emergency workers arrived, police said. "Just a few minutes after I entered I heard a huge explosion, we ran outside to see what was happening, I saw bodies and the wounded all over the place," said Assam Dhiyab, a policeman who was collecting his unit's wages in the bank. A Tikrit hospital official said at least 15 people were killed and more than 30 wounded in the blasts. Most of the casualties were Iraqi soldiers.