Tokyo 2020: BMX rider WIPES OUT rogue official at high speed on the track mid-race in latest Olympics blunder

OLYMPIC BMX rider Niek Kimmann suffered a shocking collision with an official on a day of blunders by Tokyo 2020 organisers.

The 25-year-old Dutchman was getting some training in on the Japanese circuit ahead of the start of the competition at the Games on Thursday.

But his preparation suffered a blow when he crashed into an official crossing the track at an incredibly high speed.

Kimmann posted footage of the crash on social media and added: "So this is what happened today.

"Hit an official that wanted to cross the 2nd straight. Hope the official is O.K.

"My knee is sore, but will do my best to be ready for Thursday! Thanks everyone for the messages, appreciate it!"

Kimmann's crash came on an unlucky day for Dutch athletes on two wheels.

His fellow countryman Mathieu van der Poel's chances of gold in the men's mountain biking were ended by a horror crash in the early part of the race.

Britain's Tom Pidcock went on to win the event, but pre-race favourite Van der Poel was left angry after he insisted a ramp at the Sakura Drop - the part of the course where he fell - had been removed since he had trained on it.

He tweeted: "I didn’t know. The ramp was there during the recon. I only heard they removed it during the test event."

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And in a bizarre day of strange Olympic moments, a boat blocked the beginning of the men's triathlon.

The race started in farcical fashion with a false start after half the competitors were blocked from jumping into the water by the boat.

It was eventually won by Norwegian Kristian Blummenfelt and saw a brilliant silver from Team GB's Alex Yee.

Team GB veteran Jonny Brownlee eventually came fifth after winning a bronze and silver at the last two Olympics.