Forensic officers work at the scene of a bomb blast in Istanbul.

Istanbul: A female suicide bomber was killed Tuesday when she blew herself up in an attack on a police station in the main tourist district of central Istanbul that wounded two Turkish police, the city governor said.

The woman went into the police station in the Sultanahmet district and told the police in English she had lost her wallet before setting off her charge, governor Vasip Sahin said on Turkish television.

One policeman was badly wounded and another lightly wounded, he added. Previous reports had said the attack was caused by a hand grenade.

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