Police in Tokoroa are investigating a serious assault where a man was attacked while getting into his car in his driveway.

Around 5am, the victim was getting into his car on his driveway on Grace Crescent when a man approached him from behind and seriously assaulted him, says a police spokesperson.

"He was taken to hospital in serious condition - his injuries are not life threatening.

"The offender is unknown to the victim and Police are working to determine the offender's identity.

"Further reassurance patrols are being conducted in the area following the assault, and Police would like to remind locals to report any suspicious activity to us straight away.

"If you have any information which may help Police's investigation, please contact Police on 105."