Turkey Blocks, a Twitter account that regularly checks if sites are being blocked in the country, reported at 1:04 PM Pacific (11:04 PM Istanbul time) that Facebook, Twitter, and YouTube were all unresponsive, though Instagram and Vimeo remained available.

Some residents of Turkey appear to be able to get online, likely via a VPN or some other anonymizing service. Many are publishing images of military occupation of important landmarks like bridges, and one tweet shows what appears to be a fighter jet flying very low over Ankara. Tanks have been photographed at Istanbul’s Ataturk Airport.

The Associated Press reports that the Turkish prime minister has confirmed that there has been a coup attempt by a group within Turkey’s military. Some reports have it that the group has seized control, overthrowing Erdogan. The Telegraph is updating live.

This story is developing; we will continue to update it as more information becomes available.