We are pausing our live coverage of the assassination of Russia's ambassador to Turkey, Andrei Karlov. Here's a round-up of what we know:
- Mr Karlov was shot dead by a gunman as he was speaking at a photo gallery in Ankara;
- The attack was apparently in protest at Russia's involvement in Aleppo;
- The gunman has been identified as Mevlut Mert Altintas, a police officer at Ankara's riot police. It is not clear if he acted alone or had links to any group;
- Turkey has condemned the attack, saying it will not allow it to harm bilateral relations.
- Read our story here.