At least two people were killed and several injured on the Greek island of Kos by a powerful earthquake which struck between Turkey and Greece today morning. <br/><br/>Greece's semi-official Athens News Agency (ANA) reports the deaths were confirmed by George Kyritsis, the mayor of the island which is a major tourism resort. Separately, Greece's fire service said it has rescued three injured persons from a damaged building.<br/><br/>The US Geological Survey put the magnitude of the tremor at 6.7, with its epicentre off the Turkish coastal city of Marmaris. European quake agency EMSC said, a 6.7-magnitude earthquake off the southwestern coast of Turkey could cause a small tsunami in the area although Turkish officials said large waves were more likely than a tsunami.