Alexei Navalny will challenge Vladimir Putin in March's presidential election. Mr Navalny is widely regarded as the only candidate with a chance of challenging the president, who is seeking a fourth term that would see him become the longest-serving Russian leader since Joseph Stalin. Also, Christians in Mosul celebrate Christmas for the first time in four years after the Islamic State were defeated and driven out of the city, and a report on a unique New Year's celebration in Japan.
Tropical Storm Tembin brings flash flooding and mudslides to Mindanao island.
Also: a new report says at least 10,000 people were killed in the Tiananmen Square massacre in China in 1989, and a mission to rescue sick children in rebel held territory in Syria.
The tough measures imposed over Pyongyang's missile programme target petrol supplies. Also: Two former football officials are convicted of corruption and the Japanese tradition of Beethoven at Christmas.
The former Catalan leader, Carles Puigdemont, has called on the Spanish prime minister to negotiate a political solution to the crisis in Catalonia. Also: Boris Johnson urges better Russia relations and warming up at a Gloggfest in Sweden.
Parties favouring independence look set to maintain a majority in the region's parliament. The previous administration was dissolved by Madrid after it declared independence from Spain. Also: The UN General Assembly passes a resolution condemning President Trump's decision to recognise Jerusalem as the capital of Israel, and the smash-hit musical 'Hamilton' hits London's West-End.
The people of Catalonia are voting in a closely watched regional election, called by Spain following a controversial independence referendum. Also: Melbourne attack 'not terror related' and Apple admits slowing down older iPhones.