A surfer has been attacked by a shark on New South Wales' mid-north coast.
The man in his 20s is being treated for a severe arm injury after the attack at Crescent Head Beach, a NSW Ambulance spokesman said.
Four crews from the Westpac Rescue helicopter attended the incident, which occurred at about 4.30pm.
NSW's Department of Primary Industries said it was assisting Surf Life Saving NSW, which has closed Killick And Crescent Head beaches.