There is yet to be a full statement from the Tour following Porte’s accident.
Porte and Dan Martin crashed on a bend midway through stage nine of the Tour.
“He was conscious, it’s reassuring, he is being transferred to the hospital,” race doctor Florence Pommery said.
Reports that Porte may have fractured his back appear to be untrue, although his current condition is not yet known.
Porte’s bike sprang out from beneath him after he cut into a bend while descending Mont du Chat outside Lyon.
He fell forward head first onto the road and then went into the wall on the opposite side of the tarmac, colliding with Martin.
He was put in a neck brace by medical officials, while Martin, who got up from the incident, crashed again shortly after.
The 32-year-old is Chris Froome’s main challenger for the Tour this year.
Richie Porte crashed on day nine of the Tour de France
Richie Porte was put in a neck brace by medics
Tour de France stage nine
The ninth stage was eventually won by Cannondale-Drapac rider Rigo Uran, who beat Warren Barguil into second place.
Froome finished third to maintain his challenge for the overall victory.
Martin spoke after the race about the incident, saying: “Richie lost it on one corner – it was so slippery, I guess the organisers got what they wanted.
“It was so slippery under the trees.
“I was very, very lucky to get away as lightly as I did.”
Martin also tweeted: “Not nice arriving at the next hairpin [after the Porte crash] and learning I had no front brake”.
Rigo Uran won the ninth stage
Haven’t watched today’s stage and 100% won’t be after reading some of my mates have been hurt. Really hope all who crashed today are ok.
— Mark Cavendish (@MarkCavendish) July 9, 2017
#TDF2017 Devastating images of @richie_porte coming from the road after a nasty crash. Richie will be taken to hospital for examination.
— BMC Racing Team (@BMCProTeam) July 9, 2017
Feel very sorry for my good friend and training buddy. @richie_porte It won’t be the same here without you! Heal quick
— Michael Valgren (@MichaelValgren) July 9, 2017
All fingers crossed that Richie Porte is ok. That crash looked nasty.
— Simon Geschke (@simongeschke) July 9, 2017
Crazy day on @LeTour Remarkably it seems I bounced well and I’m relatively ok. Sure to be sore tomorrow. Best wishes @richie_porte
— Dan Martin (@DanMartin86) July 9, 2017
Reaction to the crash
An official announcement from the Tour is expected.
His team BMC Racing tweeted: “Devastating images of @richie_porte coming from the road after a nasty crash. Richie will be taken to hospital for examination.”
The incident happened when Porte was travelling at 72.5km.
The Tour’s official twitter account confirmed his race for the year is over.
He was quickly put into an ambulance and taken to hospital.
Richie Porte was carried off on a stretcher
Geraint Thomas injury
Porte is not the first cyclist to have exited the Tour after a major crash this year.
Geraint Thomas, one of Froome’s key helpers, also fell on stage nine and left the race with a broken collarbone.
He tweeted afterwards: “Such a s*** day!!! Nowhere to go when Rafa went down right in front of me. But I’m ok though, thanks for all your messages!!”
Mark Cavendish also exited the Tour earlier this week when breaking his shoulder after being nudged into barriers on a sprint finish by Peter Sagan, who was subsequently disqualified.
Here’s an X-ray of Geraint Thomas’s broken shoulder. He’s out of the Tour de France
Tour de France stage nine result:
1. Rigoberto Uran (Col/Cannondale) 5hrs 07mins 22secs
2. Warren Barguil (France / Sunweb) Same Time
3. Chris Froome (Britain / Team Sky)
4. Romain Bardet (France / AG2R)
5. Fabio Aru (Italy / Astana)
6. Jakob Fuglsang (Denmark / Astana)
7. George Bennett (New Zealand / LottoNL) +1min 15secs
8. Mikel Landa (Spain / Team Sky) Same Time
9. Daniel Martin (Ireland / Quick-Step)
10. Nairo Quintana (Colombia / Movistar)
11. Simon Yates (Britain / Orica)
Tour de France general classification after stage nine:
1. Chris Froome (GB/Team Sky) 38hrs 26mins 28secs
2. Fabio Aru (Italy / Astana) +18secs
3. Romain Bardet (France / AG2R) +51secs
4. Rigoberto Uran (Colombia / Cannondale) +55secs
5. Jakob Fuglsang (Denmark / Astana) +1min 37secs
6. Daniel Martin (Ireland / Quick-Step) +1min 44secs
7. Simon Yates (Britain / Orica) +2min 02secs
8. Nairo Quintana (Colombia / Movistar) +2min 13secs
9. Mikel Landa (Spain / Team Sky) +3min 06secs
10. George Bennett (New Zealand / LottoNL) +3min 53secs