A Turkish leftist group is claiming responsibility for a suicide bombing at an Istanbul police station on Tuesday that killed an officer and wounded another.

Authorities say the female bomber entered the building in the tourist district of Sultan Ahmet and blew herself up.

In a statement posted on a website, the leftist Revolutionary People's Liberation Party-Front, or DHKP-C, said it carried out the attack. It called the bombing "an act of sacrifice."

It was the second attack on police in a week in Istanbul claimed by the group. Last week, police subdued a man after he threw grenades and fired a weapon at officers near the prime minister's offices.