Two car bombs targeting police exploded in the city of Tikrit on Sunday, killing two officers and wounding five others, Iraqi authorities said.

Tikrit, Saddam Hussein's hometown, has been a hotbed of resistance against U.S. forces over the past 15 months.

One car bomb exploded near a police station, killing two police and wounding two others, according to Iraqi police Lt. Nabil Abdel-Hamid.

Another car bomb exploded near a police training center, wounding three officers, according to Iraqi police Capt. Louai Qahtan.

Insurgents have targeted police and local officials, whom they consider collaborators with U.S. forces.