A crime scene has been established at Port Macquarie after police received reports of two men fighting in Crestwood Drive around 9.30am.

When police arrived, they discovered an 81-year-old man with injuries to his hands, torso and legs.

Paramedics treated him at the scene before taking him to Port Macquarie hospital.

Police said initial investigations revealed a lawn mower and a large knife were used in the altercation.

A 72-year-old man is speaking with investigators at Part Macquarie police station.

Inquiries are continuing and police urge anyone with information relating to the incident to contact Crime Stoppers by calling 1800 333 000 or using the online reporting page.