A man has died after a high-speed police chase ended when he crashed into a roundabout at the end of the M55 in Blackpool.
The car, which was being pursued by police, was left badly smashed up in the middle of the road following the incident on Wednesday evening.
The driver, a man in his 50s, was flung from the vehicle in the crash, at the junction with Yeadon Way.
Lancashire Police has referred the matter to the Independent Police Complaints Commission (IPCC), which is now investigating.
Paramedics were called to the roundabout just after 9pm and the motorway was closed for several hours while investigations took place.
One eye-witness reported seeing blood on the road.
Michelle Tighe, who was on the roundabout at the time of the crash, said: "It was horrendous, it really was."
An IPCC spokesman said: "The IPCC has begun an independent investigation after a man died following a police pursuit in Blackpool on Wednesday evening.
"IPCC investigators were deployed overnight following a referral from Lancashire Constabulary and an investigation is underway."
A North West Ambulance Service spokesman said: "I can confirm we got a call at 9.07pm yesterday.
"A male was involved in a road traffic collision. He was ejected from the car."
No other casualties were reported.
The Highways Agency posted on Twitter that the motorway had partially re-opened shortly before 6am today. By 7.45am, all lanes were open again.
A Lancashire Police spokesman said: "This collision has cost someone their life and our thoughts are with his family at this time"
"We immediately referred the incident to the Independent Police Complaints Commission, this is standard practice following a death after police contact."
* The IPCC originally reported the man's age as 54, although The Gazette now understands this has not yet been confirmed.