A Turkish court trying an Islamist militant accused of treason has adjourned until April.

Metin Kaplan, also known as the "Caliph of Cologne," faces charges of trying to overthrow Turkey's constitutional order. He is accused of activities that include allegedly plotting to crash an airplane into the mausoleum of the founder of secular Turkey, Kemal Ataturk.

During Monday's start of his trial, the accused said he opposes terrorism and was not involved in any terrorist activity.

Metin Kaplan was extradited from Germany in October, where he had served a prison sentence for inciting his followers to murder a rival. His group "Caliphate State" lobbies for the creation of an Islamic government and is banned in Germany.

Some information for this report provided by AP and AFP.