A strong earthquake measuring 6.7 struck off the coasts of Turkey and Greece.

At least two people were killed and about 120 were injured on the Greek holiday island of Kos, Reuters reported.

Across a narrow Aegean Sea waterway in Turkey's Bodrum, around 70 people were admitted to hospital, injured in their attempts to flee the overnight temblor. A local hospital official said 100 people were injured, most slightly. 

Greek authorities had dispatched helicopters to airlift the injured to the larger island of Rhodes for treatment.