Russia Vows Response to Diplomat Expulsions from US

Russia has promised to respond to the expulsion of 35 of its diplomats from Washington, amid a bitter dispute over alleged Russian interference in the recent US presidential election. A spokesman for President Vladimir Putin said the Kremlin's reaction would cause the US "significant discomfort".

A nationwide ceasefire between Syrian government forces and rebel groups has come into effect. The truce, brokered by Russia and Turkey, which will act as guarantors, began at midnight (22:00 GMT).

Most schools celebrating Christmas have a nativity play. However, the Kuang Fu High School in China decided to hold a mock Nazi rally for its Christmas parade. Now its principal, Cheng Hsiao-Ming, has been forced to resign. We find out what they were thinking.