TURKISH military chiefs say they have carried out a coup and overthrown the Government.
Shots have been fired in the capital Ankara and helicopters and military jets are flying overhead.
Both of Istanbul’s bridges across the Bosphorus, the strait separating the European and Asian sides of the city have been closed to traffic.
Tanks have surrounded the entrance to Istanbul’s Ataturk International Airport and there are unconfirmed reports that flights in and out of the country have been cancelled.
Turkey’s armed forces said they had taken power in the country to protect the democratic order and to maintain human rights.
In a statement sent by email and reported on Turkish TV channels, the military said all of Turkey’s existing foreign relations would be maintained and that the rule of law would remain the priority.
Turkey’s prime minister Binali Yildirim said a faction within the army had attempted to seize power but that they would be pushed back and that it was wrong to call it a coup.
He said: “Some people illegally undertook an illegal action outside of the chain of command.
“The government elected by the people remains in charge. This government will only go when the people say so.”
He said Turkey’s security services had been ordered to do whatever necessary to resolve the situation and warned those responsible would “pay the highest price”.
Officials said President Recep Tayyip Erdo?an was safe and had urged the world to show solidarity with the Turkish people.