Authorities in the Turkish city of Izmir say six migrants drowned in waters off the nearby Greek island of Kos.

The Izmir governorship said Wednesday that six coast guard vessels and a helicopter were involved in a rescue of migrants off a sinking ship early Tuesday.

Turkey's coast guard says it rescued 70 migrants from the ship and that the migrants, among them a five-year-old girl, were rescued.

Video released by the coast guard shows terrified, gasping migrants being pulled from the sea as beams of light crisscross the dark water.

Thousands of migrants from across Asia and Africa routinely try to brave the seaways between Turkey and Greece in an attempt to get to Europe in flimsy vessels under cover of night.