A tense Sunday night matchup between the Kansas City Chiefs and the Detroit Lions ended in a heated altercation after the final whistle, marring what had been a hard-fought game at Arrowhead Stadium.

Following the Chiefs’ 30-17 victory, quarterback Patrick Mahomes approached Lions defensive back Brian Branch for a postgame handshake.

According to multiple reports, Branch refused to acknowledge Mahomes’ gesture.

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Chiefs wide receiver JuJu Smith-Schuster appeared to take exception to Branch’s reaction, leading to a verbal exchange that quickly escalated into a physical confrontation.

Witnesses on the field said Branch shoved Smith-Schuster in the helmet after the two exchanged words.

The wide receiver stumbled to one knee as Chiefs running back Isiah Pacheco stepped in to try to separate the players. Moments later, Smith-Schuster attempted to lunge toward Branch, reigniting the confrontation.

Despite Pacheco’s efforts to restrain him, Branch managed to grab Smith-Schuster’s helmet and rip it off.

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Players from both sidelines rushed in to intervene, with members of each team attempting to pull the two apart.

At least one more punch was thrown before officials and teammates restored order.

Fight breaks out at the end of the Chiefs vs Lions game pic.twitter.com/xt6KBj5pC3

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The situation eventually cooled, and players returned to their respective sidelines.

The brief scuffle ended with no reported injuries, but league officials are expected to review footage of the incident.

Disciplinary action from the NFL is considered likely, though no penalties had been announced as of late Sunday.

Kansas City’s win marked a crucial rebound after the team’s loss to the Jacksonville Jaguars earlier in the week.

The Chiefs improved to 3-3 on the season behind a strong offensive performance led by Mahomes, who threw for multiple touchdowns and kept the team in control during the second half.

The Lions, meanwhile, saw their four-game streak of scoring at least 30 points come to an end.

Detroit’s offense struggled to find rhythm against the Chiefs’ defense, which capitalized on several key stops in the red zone.

The loss dropped the Lions to 4-2, though they remain near the top of the NFC North standings.

After the game, both teams were seen leaving the field without further incident.

Reporters noted that Mahomes appeared calm as he exited, while Smith-Schuster was escorted to the locker room by teammates and staff members.

Branch did not speak to the media following the altercation, and Lions representatives declined immediate comment on the brawl.

The league has not released a statement regarding potential fines or suspensions, but similar postgame altercations in previous seasons have resulted in fines or short-term disciplinary measures.

NFL officials are expected to review broadcast footage and on-field reports to determine accountability.

The Chiefs will face the Los Angeles Chargers next week, while the Lions are scheduled to play the Chicago Bears.

Both teams enter Week 7 with key divisional matchups ahead — but for now, much of the focus remains on the late-game clash that overshadowed Kansas City’s victory.

What began as a competitive contest between two playoff-caliber teams ended in controversy, with the NFL once again expected to address player conduct as part of its ongoing enforcement of postgame discipline.