One person is in critical condition following a Napier assault after which the alleged offender left the scene on a motorbike.

Police were called to the incident on Latham Street just after 3pm.

The victim sustained critical injuries and has been admitted to hospital.

Police would like to speak to anyone who witnessed the attack, and anyone in the Latham Street area who may have CCTV footage.

“The alleged offender is described as a male in his mid-20s, of slim build, with short hair,” said police.

Police are also seeking the motorbike helmet worn by the alleged attacker — which police said was taken from him by a concerned onlooker in attempt to prevent him from leaving.

“A scene examination has been completed and police will continue to have a presence in the area.”