(OAHU, Hawaii) — Two pilots are alive after their plane crashed several miles off the coast of Oahu, Hawaii, following an emergency, according to the Hawaii Department of Transportation.

The Transair Boeing 737-200 cargo plane was en route to Maui from Honolulu when the pilots reported that one engine was down and they were having problems with the second, officials said. Around 1:46 a.m. local time the pilots lost their second engine and notified the Federal Aviation Administration that they were going down.

One pilot was taken to a trauma center and the second was on a rescue boat heading to a fire station, officials said.

The Queens Medical Center said it received one patient in critical condition.

The cause of the crash was not immediately clear.

The National Transportation Safety Board said it’s sending seven investigators to the scene. Boeing said it’s monitoring the situation and is in contact with the NTSB.

This is a developing story. Please check back for updates.

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