An environmental demonstration in Istanbul on Friday quickly spiralled into a wider, violent nationwide protests against Prime Minister Recep Tayyip Erdogan's increasingly authoritarian government.
The Foreign Office advised Britons to avoid the areas where protests were taking place in Istanbul, Ankara and several other cities.
"Demonstrations are taking place in Istanbul and in other cities across Turkey, including Ankara. Police are using tear gas and water cannons in response. We advise British nationals to avoid all demonstrations," the Foreign Office said.
"Demonstrations occur regularly in major cities and have the potential to turn violent."