A Royal Canadian Navy helicopter went down on Wednesday in the Ionian Sea, Greece, during a NATO exercise.

The CH-148 Cyclone helicopter was carrying six servicemembers (four crew and two passengers). Contact with the aircraft was lost approximately 50 nautical miles west of the Greek island of Kefalonia. As of Thursday morning, the search-and-rescue (SAR) attempts have recovered the body of one person; the fate of the other five people onboard is unknown.

Initially, the Italian Air Force and Navy unilaterally conducted the SAR efforts. However, on Thursday morning, a Hellenic Navy S-70 Sikorsky joined the SAR efforts after a request from NATO.

The CH-148 that went down was the organic air asset of HMCS Fredericton, a Halifax-class frigate.

In a statement on Twitter, the Canadian Armed Forces stated,

“[there is a] developing situation regarding our CH-148 Cyclone, deployed onboard HMCS Fredericton, which is currently contributing to Operation Reassurance. Contact was lost with the aircraft as it was participating in Allied exercises off the coast of Greece. Search and rescue efforts are currently underway. As this is evolving, we have no further information to provide at this time.”

The Canadian Armed Forces also stated that they have contacted the next of kin for all members onboard the helicopter.