McLaren team principal Andrea Stella said the collision between his drivers in the Singapore sprint race was "simply not acceptable."
Lando Norris and Oscar Piastri collided toward the end of the 20-lap race as Norris attempted to pass his teammate for fourth place on the inside of Turn 5.
The British driver managed to get his car partly alongside the Australian on entry to the corner but ran out of space at the apex and the pair collided.
Piastri retired from the sprint as a result of the incident, while Norris continued to eighth at the checkered flag, scoring McLaren a single point instead of the nine it would have scored for finishing fourth and fifth.
Speaking following Saturday's Singapore Grand Prix qualifying session, Stella made clear that the incident had gone beyond what the team considers acceptable.
"It's been a long day," he told Sky Sports. "The sprint race was a race that was giving us some good points in a moment in which we were not in condition to win. Still, we were in condition to score good points.
"And we saw two McLarens having contact, basically going out of the race. Lando could score one point, but definitely that's not enough. And seeing two McLarens making contact like that is simply not acceptable.
"This is something that we will discuss with our drivers. We will do it in private. We will reiterate that the team interest is far bigger than any of us.
"There's no ego, there's no person that is bigger than the interest of the McLaren Formula 1 team. This will be reiterated. I'm sure, like always, this will be conversations that will lead to the team being more united and even stronger."
The collision brought back memories of the two drivers rubbing wheels in Singapore while fighting for the title last year -- an incident that Norris was blamed for internally, resulting in "consequences" for the eventual champion at the next round in the United States.
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Throughout the 2025 campaign, McLaren frequently referenced its "Papaya Rules," which forbid the drivers from making contact while racing for position.
Norris and Piastri said conversations had already taken place in Singapore between the sprint race and qualifying, with Norris revealing that he apologised.
"As a team, we all spoke about it," Norris told Sky Sports. "I apologized, but that's all you need to know."
Speaking separately to the written media, Norris added: "As you probably expect, no one's very happy. I'm not happy, Oscar isn't happy, none of us wanted to go that way.
"There were things both of us could have done better and we spoke about it and we moved on."
Despite Stella's insistence that further discussions will take place in private, Piastri indicated that he was ready to put the incident behind him.
"I mean, it was clear that those kind of things can't happen," Piastri said. "Everyone knows where we sit. So, yeah, we'll all be fine and keep pushing together like we always did."
The stewards investigated the collision after the sprint race but opted not to give a penalty after ruling "both drivers had contributed to the incident."