"Media reports indicate that a military operation is taking place in Istanbul and Ankara". Mr. Erdogan was reportedly on holiday along the Agean coast when military leaders took action.
The Turkish President, Recep Tayyip Erdogan urged people to take to the streets to protest against what he described as a coup attempt by a minority faction within the military.
Turkey's armed forces "fully seized control" of the country Friday, according to a statement from the military published by a Turkish news agency, as gunfire was heard outside military headquarters, fighter jets buzzed over the capital and vehicles blocked two major bridges in Istanbul.
The country's internal political and internal strife have only been exacerbated by the ongoing Syrian civil war, and now the fight against the Islamic State, spilling across Turkey's borders along with the increasingly powerful role Kurdish separatist groups are playing in the ISIS fight.
When the coup began, soldiers blocked two bridges in Istanbul between the European and Asian sides.
"We will punish it [in] the hardest way", Turkey's Hurriyet Daily News reported the prime minister as saying.
"They were evacuating the entire square", our reporter said.
Prime Minister Binali Yildirim said earlier on Friday night (local time) that a group within Turkey's military had attempted to overthrow the government and security forces had been called in to "do what is necessary".
"All our global agreements and commitments retain their validity", the statement added.
The Turkish military claim of a takeover was read by an anchor on state broadcaster TRT.
Data from CloudFlare, which provides internet traffic and security services to websites, showed a 50 percent drop in internet traffic coming out of Turkey, the company's chief executive, Matthew Prince, said on Twitter.
An official at Haydarpasa Numune Hospital in Istanbul said at least 150 people were admitted with wounds, but would not comment on whether there were fatalities.
"I call for calm and restraint, and full respect for Turkey's democratic institutions and its constitution".
Meanwhile, the head of the AKP in a phone call with CNNTürk called on citizens to hit the streets, saying that a group of soldiers were trying to take him and other party members out of the building, Hurriet reported.
Foreign Secretary Boris Johnson tweeted that he was "very concerned" by the events unfolding in Turkey. "We hope our good relations with all global countries goes on".
Statements against the coup have also been released by the Special Forces, Naval and Intelligence commanders.
YouTube said it was aware of reports that its site was down in Turkey although it was not experiencing any apparent technical difficulties, indicating that an order to restrict access came from within Turkey.