A man working at an asphalt plant in Melville was seriously injured in a fall, Suffolk police said.
Timothy Baumann injured his arm after falling off a conveyor belt at Rason Asphalt, l136 Spagnoli Road, at 8:04 a.m., police said.
Baumann, 26, of Merrick, was airlifted by Nassau County Police helicopter to Nassau University Medical Center in East Meadow for treatment.
The Occupational Safety and Health Administration (OSHA) was notified and is investigating.
Suffolk police Second Squad detectives are investigating the accident.