Police car involved in collision while rushing to crash scene

A police patrol car rushing to the scene of a crash on an Upper Hutt motorway has led to a second collision this evening.

Emergency services were called to the scene on State Highway 2 River Rd, between Fergusson Dr and Totara Park Rd in Clouston Park, around 5.50pm after a two-vehicle crash.

"Fortunately, there have been only moderate injuries reported," police said.

"While travelling under urgent duty driving to the crash, a police unit was also involved in a three-vehicle crash on River Rd near Gibbons St.

"There have been no serious injuries, however a scene examination will be carried out, necessitating road closures."

Diversions are in place.

Motorists have been advised to avoid the area if possible, and expect delays.