Police are investigating a two-vehicle crash on the Bass Highway near Elizabeth Town this afternoon.

The crash involved an unmarked police car and a Mitsubishi Triton, which were both travelling west between Deloraine and Latrobe.

Circumstances surrounding the crash are being investigated, however initial enquiries indicate that the Triton has collided with the rear of the police vehicle, while attempting to merge.

Four police officers (a man and a woman from AFP, and two men from Tasmania Police) received non-life-threatening injuries, after their vehicle rolled down an embankment.

As is normal process for a crash involving police, the Tasmania Police Professional Standards Unit has been advised and will monitor the investigation.

Anyone who witnessed the crash is asked to contact police on 131 444. Dashcam or other footage can be submitted via the Evidence Portal.