Tikrit, Iraq, Feb 24, SPA -- A man wearing a police uniform drove acar bomb inside the headquarters of police in Tikrit town on Thursday, setting off a massive explosion that killed at least 15 police andwounded 22 others, police and witnesses said. The blast occurred at one of the station's busiest times,when dozens of policemen were arriving to relievecolleagues who'd been working all night, Daham said. "He waited until the shift change, then he exploded thecar," Daham said, adding the aim was "to kill as many aspossible." Daham said the attacker was able to slip into the stationundetected because he was wearing a police lieutenant'suniform. He blamed guards at the station's gates forallowing the bomber to enter without checking his papers orsearching his vehicle. Twenty cars were set ablaze after the massive blast,sending clouds of smoke into the sky. An Associated Pressphotographer on the scene saw at least 10 charred bodieslaying on the ground, which was splattered with pools ofblood and bits of human flesh. Several ambulances raced to the blast site, ferryingcasualties to a local hospital. Police Capt. Hakim Mohammed, part of a force protectingTikrit's main hospital, where most of the casualties werebrought, said 15 people died and 22 were wounded. Dahamconfirmed the casualty toll. Khalil Ibrahim of Tikrit hospital said all the dead andinjured were policemen. U.S. troops sealed off the area immediately after theblast, preventing people from entering. U.S. forces alsoset up new checkpoints across the city, searching vehicles,residents said. U.S. Army Maj. Neil Harper confirmed the attack was a carbomb, but he had no other details.--SPA1146 Local Time 0846 GMT www.spa.gov.sa/241954