At least 15 people were killed on Tuesday evening after a coast guard ship collided with a speedboat carrying migrants at sea near the Greek island of Chios.
Of the 25 people who were rescued, 24 of them, including 11 children, were hospitalized on the eastern Aegean island near Turkey.
One of the rescued people later died. Two coast guard officers were also slightly injured, the coast guard said.
It is not clear how many people were on the speedboat at the time of the incident, and the search for the missing continued on Wednesday.
Four coastal patrol boats, two helicopters and divers began a search overnight that continued into the morning, with one helicopter and five patrol boats still involved.
The Greek Coast Guard said in a statement on Wednesday that one of its patrol vessels spotted a speedboat traveling towards Chios late Tuesday without navigation lights. Despite sound and visual signals from the patrol vessel, the speedboat did not stop.
"Instead, the (motorboat) pilot turned and the vessel then collided with the starboard side of the Coast Guard patrol vessel," the statement added, "the force of the impact caused the vessel to capsize and sink."
