A fault has caused a set of train barriers on Aotea Quay in Wellington to come down, blocking the road.

Traffic was heavy outside the Hnry Stadium as a result.

“An unknown issue has caused the barriers to come down and efforts to put the barriers up have been unsuccessful,” police said in a statement about 8.30pm Friday.

“Motorists should avoid the area as the blockage is cleared.”

The incident could see traffic delays as fans leave the stadium following the Hurricanes win against the Brumbies.