Former MotoGP champion Nicky Hayden has died five days after he was hit by a car while training on his bicycle. He was 35.

The Bufalini hospital in the northern Italian city of Cesena last week announced US-born Hayden had severe cerebral damage and multiple traumatic injuries.

“It is with great sadness that Red Bull Honda … has to announce that Nicky Hayden has succumbed to injuries suffered during an incident while riding his bicycle last Wednesday,” his Honda World Superbike team said in a statement early Tuesday.

“Nicky passed away at 19.09 (local time) this evening at Maurizio Bufalini hospital in Cesena. His fiancee Jackie, mother Rose and brother Tommy were at his side,” the team said.

Hayden, who was in Italy following a race at nearby Imola, was transported to the Bufalini facility following the incident on the Rimini coast on Wednesday.

“The medical team has verified the death of the patient Nicholas Patrick Hayden, who has been undergoing care since May 17 in the intensive care unit of the Bufalini Hospital in Cesena following a very serious polytrauma which occurred the same day,” the hospital statement said.

The black Peugeot car that hit Hayden had its front windshield smashed.

Judicial authorities have opened an investigation into the incident and questioned the 30-year-old driver of the Peugeot.

Hayden won the MotoGP title in 2006, finishing narrowly ahead of Italian great Valentino Rossi.

In a MotoGP career spanning 2003-16 with Honda and Ducati, Hayden posted three victories and 28 podium finishes in 218 races.

After switching to the World Superbike championship last year, Hayden finished fifth in the 2016 standings.

Hayden was 13th in Superbike this season, riding for the Red Bull Honda team.

Hayden was born in Owensboro, Kentucky.

Several family members had flown in from the United States, including Hayden’s mother and brother.