VIDEO | Patrol boat capsizes near Kastellorizo, Greece; all on board rescued

All five people who were on the boat were safely rescued. These included three Estonian crewmembers, a Hellenic Coast Guard liaison officer, and Karin Rannu, the Estonian Ambassador to Greece.

The ambassador and three other people were later brought aboard a Hellenic Air Force helicopter and evacuated to hospital in Megisti to undergo treatment for injuries.

An Estonian Police and Border Guard Board official said the ambassador suffered minor injuries while two of the Frontex boat's Estonian crew were in serious condition.

The Port Authority of Megisti has begun an investigation into the mishap.