Russian jet hit inside Syria after incursion into Turkey - U.S. official

Some rises over a mountainous area in northern Syria after a war plane was shot down by Turkish fighter jets near the Turkish-Syrian border November 24, 2015. REUTERS/Sadettin Molla

WASHINGTON (Reuters) - The United States believes that the Russian jet shot down by Turkey on Tuesday was hit inside Syrian airspace after a brief incursion into Turkish airspace, a U.S. official told Reuters, speaking on condition of anonymity.The official said that assessment was based on detection of the heat signature of the jet. (Reporting by Phil Stewart; Editing by Mohammad Zargham)