The death of a fan who attended Sunday night's New England Patriots game in Foxborough, Massachusetts is under investigation, according to prosecutors.

An "incident" in the 300-tier section of Gillette Stadium prompted Foxborough police and firefighters to respond around 11 p.m. during the fourth quarter of New England's loss against the Miami Dolphins. Though it's unclear what occurred, the Norfolk District Attorney's Office said in a media release that 53-year-old Dale Mooney "was in apparent need of medical attention."

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Mooney, of Newmarket, New Hampshire, was rushed to Sturdy Memorial Hospital in Attleboro, where he was pronounced dead just before midnight, the district attorney's office said.

Investigators with Massachusetts State Police assigned to the Norfolk District Attorney’s Office are investigating Mooney's death, the office said in its release.

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Lisa Mooney, Dale Mooney's wife, was quoted in multiple news reports as saying that her husband was a lifelong fan of the Patriots who had been a season-ticket holder for 30 years.

Witness accounts and video have surfaced in multiple reports indicating that Mooney had apparently been involved in a verbal confrontation that turned physical. But the district attorney's office did not immediately say whether his death was related to any sort of physical altercation.

No one has been charged in relation to Mooney's death, and the district attorney's office indicated that an autopsy was expected to have been completed Monday. The results had not been released as of Tuesday afternoon.

The New England Patriots have not released a statement addressing the incident.

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Eric Lagatta covers breaking and trending news for USA TODAY. Reach him at [email protected].