A Turkish policeman has shot dead Russia's ambassador to Turkey, Andrei Karlov, apparently in protest at Russia's involvement in Aleppo.

President Recep Tayyip Erdogan on Tuesday launched his most bitter attack yet on Turkey's Western allies over the July 15 attempted putsch, accusing them of supporting both "terror" and the coup plotters who tried to unseat him.

President Recep Tayyip Erdogan on Saturday said he wanted to introduce constitutional changes to bring the Turkish spy agency and military chief of staff directly under his control as he seeks to tighten his grip on the country after the failed coup.

Scores of people have been killed in Turkey and more than 1,400 wounded as a result of an attempted coup overnight. But who was responsible, what happened and why?