The Honolulu Fire Department is investigating an accident during a training operation in which two firefighters were injured, one critically, Tuesday morning in the ocean off Leahi Beach Park at Diamond Head.

The accident occurred at 10:45 a.m. during a rescue watercraft training operation.

HFD issued a short news release saying that one firefighter remained in critical condition and another was treated and released at a hospital.

Spokesman Capt. David Jenkins said he could not release any further details than what was contained in the news release.

The Fire Department scheduled a news conference on the accident for 8 a.m. today.