An army group in Turkey says it has taken over the country, with soldiers at strategic points in Istanbul and jets flying low in the capital, Ankara.
It is unclear who the group is or its level of support. Some top army officials are said to be detained.
President Recep Tayyip Erdogan said he would overcome what he called an uprising by a minority.
He told CNN Turk by mobile phone the action was by a "parallel structure" that would bring the necessary response. He has used this term in the past to refer to Fethullah Gulen, a US-based Muslim cleric he accuses of fomenting unrest.
Mr Erdogan called on people to take to the streets to oppose the uprising.
He said: "I urge the Turkish people to convene at public squares and airports. I never believed in a power higher than the power of the people."
Mr Erdogan said he was on his way to Ankara and those involved in the action would pay a heavy price. His office said he was in a secure location.
For rest of new report, read HERE.