Emergency services are responding to a serious crash on Main South Road in Selwyn.

It was reported to police around 5:40pm.

A spokeswoman said the crash involves two vehicles.

Injuries had not been confirmed at this stage.

The crash is near Selwyn Lake Road on a train crossing but no trains were involved.

Traffic management is being put in place at the scene.

Motorists are advised to use alternative routes and avoid the area.

A KiwiRail spokesman said “we understand a trailer of some kind has rolled at a level crossing.

“No trains are involved.

There is one freight train scheduled to go through the area, which is delayed until the track is cleared.”