A suspect was reportedly detained after what officials described as a "security incident" outside the U.S. Consulate in Istanbul on Friday, NBC News reported. Turkish police sealed off the street outside the building and detained a man for questioning, Reuters cited Turkey's Dogan News Agency as reporting. A spokesman at the consulate told NBC News there had been a "security incident" but said that staff had not been evacuated. None of the officials provided further details about why the man was detained. This is a developing story. Check back for updates.