Turkey's state-run news agency says a missing New York City woman has been found dead in Istanbul. Sarai Sierra, a 33-year-old mother of two, went missing while vacationing alone in Istanbul. She was last heard from on Jan. 21, the day she was due back home. The Anadolu Agency says that residents discovered the body of a woman near ancient city walls in a low-income district and that police later identified it as Sierra's. In its report, the private NTV news channel said Sierra was stabbed to death. It said police identified her through her driver license. Police detained a man for questioning in her disappearance yesterday.