Two pilots were rescued from a plane crash on the south coast of WA, receiving only minor injuries from the incident.

The Boeing 737 Fireliner was responding to a bushfire in the Fitzgerald River National Park, where it crashed in the area on Monday afternoon.

DFES Commissioner Darren Klem says they have not discovered the cause of the crash.

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“It certainly is the question on everyones lips, and we’re interested to find out exactly what happened but either way it’s an outstanding effort by the pilots,” Mr Klem said.