Northern Territory Police have arrested a man in relation to an aggravated assault that occurred in Katherine yesterday afternoon.

Around 5pm, The Joint Emergency Service Communication Centre was notified of an injured man in front of a business on Christie Road.

A short time later, police attended the scene and found the 42-year-old alleged offender with the victim before he fled on a on a bicycle. Police subsequently located and apprehended the man a short time later.

St John Ambulance conveyed the victim to Katherine District Hospital where he was assessed as suffering multiple facial fractures and is expected to be transferred to Royal Darwin Hospital for treatment.

The offender remains in custody with charges expected to follow.

Police continue to urge anyone who witnesses a crime to make contact on 131 444 and in an emergency contact 000.