The Turkish military has deployed in Istanbul and Ankara, and the government has apparently blocked social media in response to what is being reported as an attempted coup.
Turkey Blocks, a Twitter account that regularly checks if sites are being blocked in the country, reported at 11:04 PM Istanbul time that Facebook, Twitter and YouTube were all unresponsive, though Instagram and Vimeo remained available. Access was restored after about an hour-and-a-half, according to the research agency Dyn Research.
Some residents of Turkey appeared able to access social media, likely via a VPN or some other anonymizing service. Anyone affected might want to try Tor Browser for Windows and Mac OS or Orbot for Android (or try some of the other circumvention techniques listed here).