Man loses leg in crash after police chase

A man has had part of his leg amputated after crashing an allegedly stolen truck into a tree during a police pursuit in Perth.

Police received a report at 3am (WST) on Sunday that a flatbed truck had been stolen from a concreting business in Bassendean.

The vehicle was soon spotted by police in Guildford and allegedly failed to stop when called upon.

During a pursuit, the truck allegedly side-swiped a police vehicle, but no officers were injured.

A tyre deflation device was then deployed, police said.

A short time later, the truck hit a tree at the intersection of Welshpool Road East and Lewis Road in Wattle Grove.

A 29-year-old female passenger in the vehicle was uninjured.

The 41-year-old male driver received severe leg injuries and was taken to Royal Perth Hospital by ambulance.

Police said one leg was amputated below his knee.

Major crash officers and the internal affairs unit will investigate the incident.