Turkey bombing: Female suicide attacker hits Istanbul police station

The attack took place in the historic district of Sultanahmet

A female suicide bomber has blown herself up in the Turkish city of Istanbul, killing one police officer and injuring another, officials say.

She targeted a police station in the tourist hub of Sultanahmet, near the Blue Mosque and Hagia Sophia museum.

The woman spoke English with "a thick accent", but her nationality and identity remained unknown, Istanbul governor Vasip Sahin told Turkish TV.

No group has yet said it was behind the attack, the second on police in a week.

Police arrested a man who threw grenades and fired a weapon at officers near the prime minister's office last Thursday, but no-one was injured in that attack.