Many are still missing, according to witnesses, and the coastguard has launched a search operation assisted by vessels and aircraft since they were alerted about the incident on Friday night.
The United Nations refugee agency has voiced concern at a rise in deaths of migrants trying to reach Greece by sea in small boats from Turkey, following two fatal shipwrecks this week.
The deadly pursuit of migrant traffickers by a Coast Guard patrol boat off the southeastern Aegean island of Symi on Friday has put the spotlight on a conflict raging near Greece’s sea borders.
