Max Verstappen and Liam Lawson have been given a one-place grid penalty for an incident which saw them collide during Friday practice in Mexico.
Red Bull's Verstappen and Lawson, driving for Red Bull junior team Racing Bulls, tangled in the stadium section after going wheel to wheel for a sequence of corners. The incident started when Verstappen tried to pass Lawson on the inside of Turn 12.
As they came through the corner, Verstappen raised a hand in protest at Lawson.
The pair continued to go wheel to wheel through the next two corners and banged wheels after Verstappen went off track and rejoined. Both drivers were both summoned to see the stewards on Friday and both were found equally to blame.
The stewards verdict said: "The drivers of both cars behaved in a manner that was considered unacceptable to the stewards particularly in view of the warning that had been given at the team manager's meeting earlier this day. Both drivers admitted the moves were unnecessary and clumsy."
Both will drop one place from wherever they qualify for Sunday's race.
Lawson stood in as Verstappen's teammate this year when Isak Hadjar war injured and was alongside him for the first two races of 2025 before being demoted.
He is yet to secure a contract to keep racing with Racing Bulls next season, something Verstappen referenced after the session.
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When asked if the incident was unlucky, the four-time world champion said: "I don't think it's called unlucky. Maybe not very smart behaviour, what he was trying to do there. OK. I mean, at the end of the day, it's not going to change my weekend. But if I were him, I would act a little bit smarter. Also, when you're fighting for your seat, it's not very smart behaviour."
Lawson's boss Alan Permane, the team principal of Racing Bulls, said: "On an out lap or a cool lap, which they were both on, and I think it was probably a little bit of a excess from the pair of them. Maybe 50/50, or maybe little bit more in our favour.
"I don't know let's see what the stewards say, I don't think there was anything malicious there though.
"Neither want it to happen, both drivers are undoubtedly frustrated about, both lost a bit of time due to it. And if you look at the next run after the red flag, they were in exactly the same position and sorted themselves out sensibly."