The US has said it was viewing with concern the attempted coup in Turkey and monitoring the situation.
"The United States views with gravest concern events unfolding in Turkey. We are monitoring a very fluid situation," the US State Department said in a tweet.
Earlier, President Barack Obama spoke by phone with Kerry to discuss the events in Turkey, where troops and tanks are on the streets and military jets reported to be flying over the capital city.
Both president and secretary of state agreed that all parties in Turkey should support the democratically-elected Government of Turkey, show restraint, and avoid any violence or bloodshed", said a statement.
Kerry underscored that the State Department will continue to focus on the safety and security of US citizens in Turkey.
The President asked the Secretary to continue to keep him updated as the situation unfolds, the statement said.