By Biodun Iginla and Nataliede Vallieres, BBC News

Isik Kosaner (right) was appointed armed forces chief of staff just under a year ago

The chief of the Turkish armed forces has resigned, along with the heads of the army, navy and air force, according to media reports.

The reason for the resignations of Gen Isik Kosaner and the other heads remains unclear.

There has been a history of tension between the military and the government of Prime Minister Recep Tayyip Erdogan in recent years.

Gen Kosaner is reported to have met Mr Erdogan several times in recent days.

Gen Isik Kosaner was appointed overall head of the Turkish armed forces just a year ago.

The government had vetoed the army's original choice.

Gen Hasan Igsiz was initially proposed but was blocked by the government because he was named in connection with an alleged 2003 plot.

The alleged conspiracy was drawn up at the Istanbul base of the First Army, shortly after the governing AK Party came to power.

It reportedly involved plans to bomb mosques and provoke tensions with Greece, in order to spark political chaos and justify a military takeover.

The military says it was only a contingency plan based on scenarios of political unrest.

More on This Story