Belgian cyclist Antoine Demoitié has died after being hit by a motorbike following a fall during a race, police have said.
The 25-year-old team Wanty rider was struck during the Gent-Wevelgem race in Belgium on Sunday.
He was taken to a hospital in Lille after the accident in Sainte-Marie-Cappel, northern France.
His team had earlier tweeted that Demoitié's wife and family were with him and that he was in an "extremely serious" condition.
A police spokesman told AFP: "The rider died. An inquiry is under way to determine the circumstances."
The race was won by Slovakia's Peter Sagan.
Mark Cavendish has made himself available for selection for Great Britain's Olympic track cycling team.
The 30-year-old from the Isle of Man took time to reflect on his Track Cycling World Championships performance, where he placed sixth in the six-discipline omnium earlier this month and won gold in the non-Olympic Madison alongside Sir Bradley Wiggins.
And Cavendish, who has twice suffered Olympic disappointment, has put himself forward to be considered for August's Games in Rio after speaking to British Cycling technical director Shane Sutton.
Sutton said: "I spoke to him earlier this week on what his intentions were and his intentions are to carry on with the project.
"Given his performance at the worlds, he's decided that he wants to be put forward for selection at the Games.
"We just wanted him to go away and see where he was at. He's decided he feels he's done enough to warrant putting himself forward and he believes he can still win."
The rider in the omnium must also be able to slot into the four-rider, four-kilometres team pursuit squad as there are three rounds of competition in close proximity.
The team event takes priority over the omnium, which can be something of a lottery, and Cavendish must be able to compete at gold medal-winning, world record-breaking pace.
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Briton Brian Cookson intends to stand for re-election as president of the UCI, cycling's world governing body, in 2017.
The 64-year-old Lancastrian, who was elected in September 2013 as successor to Pat McQuaid, told delegates of his intention to stand for a further term at the annual congress of the European Cycling Union (UEC) in Portugal on Sunday.
A media release from the UEC on Monday read: "He (Cookson) informed member national federations that he intended to apply for another and final mandate of four years as president of the Union Cycliste Internationale."
Welshman Geraint Thomas has become only the third Briton to win the prestigious Paris-Nice race.
The Team Sky rider started the final day in yellow with a 15-second lead over Alberto Contador and claimed the title after Sunday's seventh stage over 141 kilometres.
Thomas, 29, follows Tom Simpson (1967) and Bradley Wiggins (2012) as British winners of an event which began in 1933, and the victory will underline his credentials as a future Tour de France winner.
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Laura Trott won her second gold medal of the Track Cycling World Championships in London with victory in the women's omnium on Sunday's final day.
The 23-year-old, who won the non-Olympic scratch race on Thursday, enhanced her advantage with a mature display in the concluding points race to claim Britain's fourth gold of the five-day competition at the Lee Valley VeloPark where she won two Olympic gold medals in 2012.
She now has seven world titles, of which are three individual crowns, and a first omnium world victory since 2012, when she went on to win Olympic gold. She will hope for a repeat in Rio in August.
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Sir Bradley Wiggins and Great Britain qualified fastest in the men's team pursuit on day one of the Track Cycling World Championships in London.
Wiggins, riding in his first Track World Championships since 2008, combined with London 2012 gold medallist Steven Burke, Jonathan Dibben and Owain Doull to clock three minutes 55.664 seconds and advance in first place to the semi-finals.
Britain will meet fourth-fastest qualifiers Italy in the semi-finals of the four-man, four-kilometres event, which take place on Thursday's second day of competition. Italy qualified in 3mins 57.800secs.
Australia (3:55.867) and defending champions New Zealand (3:57.050) will meet in the second semi-final, vying for a place in Thursday's final.
Mark Cavendish has been warned his dream of crowning his career with an Olympic medal could be over if he fails to secure a top-three finish in next week's Track World Championships in London.
Cavendish will return to the track to contest the omnium event at the London Velodrome in a race that could prove pivotal to his ambition of finally claiming that elusive place on the podium in Rio.
With competition for places at a premium, British Cycling technical director Shane Sutton expects Cavendish to be under no illusions over what is expected of him over the final few months of build-up to the Games.
Sutton said: "For Cav to be in Rio he needs to perform well next week - I would like to think he would very close to the top three in London, and he would be expecting that of himself, otherwise he would rule himself out.
"If he can't make the top three in the world, I think he would put his hand up and go back and pursue his dreams of the leaders' yellow jersey and winning stages of the Tour de France."
Cavendish is hungry for an Olympic medal after being the only member of the Great Britain team to miss out in London, and having also failed to take an expected medal alongside Sir Bradley Wiggins in the madison in Beijing in 2008.
But in order to return to track contention Cavendish will be expected to make a significant number of sacrifices, including potentially curtailing his involvement in this year's Tour de France, and also, if selected in the omnium, also joining GB's team pursuit campaign.