A Russian destroyer has used small arms fire to ward off a Turkish fishing ship and prevent a collision in the Aegean Sea, the Defence Ministry said.

At least 11 people have died and 13 are missing after a boat carrying about 50 refugees sank in the eastern Aegean Sea, Greek authorities said.

Twenty-one people have died after two boats carrying refugees from Turkey to Greece sank, in the latest fatal incidents in the eastern Aegean Sea.

At least 34 people, among them women, babies and young children, have drowned in the Aegean Sea.