It comes after a 6.7 magnitude earthquake struck off the coast of Marmaris in Turkey, which is popular with Brit holidaymakers.

But it is the Greek island of Kos that is believed to have been the worst affected, with at least two people reported to have died there.

Greek state media has also confirmed that a further 120 people were injured in the initial shocks.

There are fears the shocks could spark a tsunami with officials warning tourists to stay away from the sea.

The European Quake Agency [EMSC] said on Twitter: “A small tsunami is confirmed. AVOID BEACHES IN THE AREA, but you are safe on higher grounds.”

TOURISTS: The earthquake struck close to a number of resorts popular with Brit holidaymakers
FLOOD: A small tsunami already happened shortly after the quake struck

The US Pacific Tsunami Warning Centre, which monitors tsunamis around the world, has not issued any alert, but Turkish broadcasters have said potentially very dangerous waves could hit beaches today.

The US Geological Survey had initially estimated the quake had reached a magnitude of 6.9, but was later downgraded to 6.7.

A quake of the size is considered very powerful and capable of causing huge amounts of damage.

A spokesman for the UK Foreign Office said: "We are speaking to the Turkish and Greek authorities following an earthquake off the coast of Bodrum and near the island of Kos.

"Any British people in the areas affected should follow the instructions of local authorities."

The US Federal Emergency Management Agency has information on what to do in the event of a tsunami.

It states: