Officials in Massachusetts are reportedly investigating after a 53-year-old fan attending Sunday night’s game between the New England Patriots and Miami Dolphins died following what witnesses say was an altercation in the stands. 

Dale Mooney, a resident of Newmarket, New Hampshire, suffered an “apparent medical event” during the fourth quarter of the game at Gillette Stadium before being rushed to an area hospital, where he was pronounced dead just before midnight, Boston 25 reported, citing Massachusetts State Police. 

Dolphins play at Gillette

Tua Tagovailoa, #1 of the Miami Dolphins, throws the football during the third quarter against the New England Patriots at Gillette Stadium on Sept. 17, 2023 in Foxboro, Massachusetts. (Kathryn Riley/Getty Images)

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Mooney’s wife, Lisa, told the outlet that her husband – a lifelong Patriots fan – had attended the Week 2 matchup with some friends and had been accosted by some Dolphins fans while in their section. 

A witness told Mass Live that he observed a Miami fan assault Mooney. 

External view of Gillette Stadium

A general view of Gillette Stadium before the game between the Buffalo Bills and the New England Patriots on Dec. 28, 2020 in Foxborough, Massachusetts. (Maddie Malhotra/Getty Images)

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“The Dolphins fan walks over and clearly punches him in the face,” New Hampshire resident Joey Kilmartin said. “(He) gets knocked out and you can tell right away he’s not OK.”

Neither Massachusetts State Police nor the Norfolk District Attorney’s Office immediately responded to Fox News Digital’s request for comment. No arrests were made or charges filed as of Monday.

Retro Patriots helmet at Gillette

Retro Pat Patriot helmet during a game between the New England Patriots and the Miami Dolphins on Sept. 17, 2023, at Gillette Stadium in Foxborough, Massachusetts. (Fred Kfoury III/Icon Sportswire via Getty Images)

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The District Attorney’s office said it would be investigating the circumstances of Mooney’s death, according to ESPN. 

The Patriots did not immediately respond to Fox News Digital’s request for comment.