Police and paramedics in Truro were dealing with a casualty in the street on Highertown in Truro.
Emergency services were called to the scene near the County Arms pub and hotel with reports of a man being injured.
The man was understood to have been walking in the area when he became injured – the circumstances of his injury are not yet clear.
Paramedics were treating the man at the scene. A passer-by who did not want to be named said he appeared to be conscious and the extent of his injuries was unknown.