RT News - December 23, 2015 (17:00 MSK)

Security is tightened at Istanbul airport after an explosion kills one person and injures another; The Turkish military goes on the offensive in the country's Kurdish areas, with intense clashes across the south-east and curfews in a number of cities; Amnesty International accuses Russia of launching air strikes on civilian targets in Syria.  RT looks at the findings; Plus, live pictures from Moscow, where the Indian Prime Minister has arrived on a visit that could see him sign a seven-billion-dollar defence deal with Russia.