A disastrous collision with an unmarked road sign led to three of the leading contenders crash out of Liege-Bastogne-Liege on Sunday.

Greg van Avermaet and Jay McCarthy were seen on the ground after the incident, which saw the peloton ride straight into the road furniture during the one-day classic.

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Yates was not seen in the television images, but organisers later confirmed that the British rider had been forced to abandon the race.

Bora later confirmed that McCarthy's injuries were not serious, but Van Avermaet suffered a number of injuries, including broken ribs, a broken spinal vertebra and torn shoulder ligaments.

'That's nasty!' Head-on crash with road sign takes out riders in Liege-Bastogne-Liege

"That's a proper danger point and it wasn't flagged," exclaimed an appalled Carlton Kirby on commentary.

"Of course it should have been," added Dan Lloyd. "You can't see anything in a bunch. If you're shorter you're completely blind and completely reliant on somebody flagging it up... but it shouldn't be the sole responsibility of the riders to flag things up like that. "

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