Emergency services are at the scene of a crash where one vehicle has flipped upside down.

An eyewitness told Chris Lynch the incident has occurred on Johns Road, between Between Gardiners Rd & Wilkinsons Rd.

A police spokeswoman said the crash involving two cars was reported about 5.30PM.

Fire crews have also attended, and there were no reports of any injuries.

Emergency services have reduced traffic to one lane so traffic is starting to back up.