By Ayla Jean Yackley ISTANBUL (Reuters) - A Female suicide bomber blew herself up at a police station in Istanbul's historic Sultanahmet district on Tuesday, killing one ******r and wounding a**ther. There was ** immediate claim of responsibility; but the bombing comes less than a week after far-left group DHKP-C said it was behind a grenade attack on police near the prime minister's ****** in Istanbul. Turkey also faces possible threat from Islamist militants moving across the border from Syria and Iraq and, despite a truce in a 30-year-old insurrection, from Kurdish rebels. ...