Çankaya Municipality is set to organize a concert to commemorate Andrey Karlov, Russia's ambassador to Ankara, who was killed in an armed attack on Dec. 19 at a photography exhibition he was attending. The concert will take place on Jan. 9 at the Contemporary Arts Center, where the armed attack aimed at Ambassador Karlov took place. Opera artist Zafer Mutlu and pianist Rustam Rahmedov will perform during the commemoration concert.When: Jan. 9Where: Contemporary Arts Center, Ankara