A number of people are believed to be injured following a crash in Christchurch this morning.

The collision, between two cars, happened at the intersection of Waterloo Rd and Marshs Rd in Templeton around 6.20am, Inspector Alan Weston of the southern police communications centre, said.

Ambulance and police staff were at the scene, where it was believed three people had been injured.

The extent of their injuries were not yet known, he said.