Isle of Man TT racer Dan Kneen died in a crash while practicing for the Superbike race on Wednesday evening, event organisers have confirmed.
The accident occurred on Kneen's first lap of the 37-mile Mountain course on his Tyco BMW near Churchtown, causing the session to be red-flagged.
A second incident subsequently occurred involving a course car, which was reacting to Kneen's incident, and another rider, who was airlifted to hospital.
In a statement, the organisers said: "ACU Events Ltd regrets to confirm that Dan Kneen, 30, from Onchan in the Isle of Man died this evening following injuries sustained during the Superbike qualifying session on the Isle of Man.
"Dan had an accident at Churchtown on the first lap of the session and died at the scene of the incident.
"Dan made his mountain course debut at the Manx Grand Prix in 2008 and won an unprecedented three races - the Junior, the Newcomers C and the Ultra Lightweight MGP Races.
"He achieved his first TT podium in last year's Superstock Race, finishing third in the Superstock TT Race. He has a fastest official lap of 130.347mph which he set in last year's Superstock Race and recorded a lap of 132.258mph (17m06.994s) in last night's Superbike qualifying session.
"ACU Events Ltd wishes to pass on their deepest sympathy to Dan's partner Leanne, his family and his many friends in the road racing community and beyond."
Kneen joined the Tyco BMW squad full-time following his podium finishes in the Ulster Grand Prix in 2017, while deputising for the injured Ian Hutchinson.