Together with their bandmates, Liam and Noel Gallagher have offered their “sincere condolences to the family and friends of the person involved”.
The Metropolitan Police said officers on duty at the stadium responded, alongside venue medics and the London Ambulance Service, to reports a person had been injured at around 10.20pm.
The statement continued: “A man – aged in his 40s – was found with injuries consistent with a fall. He was sadly pronounced dead at the scene.”
According to reports, the man fell from the stadium’s upper tier.
A concertgoer on social media said they saw the incident and described it as “horrific”.
The Metropolitan Police said: “The stadium was busy, and we believe it is likely a number of people witnessed the incident, or may knowingly or unknowingly have caught it on mobile phone video footage.
“If you have any information that could help us to confirm what happened, please call 101.”
A spokesperson for Wembley Stadium said: “Our thoughts go out to his family, who have been informed and are being supported by specially trained police officers.”
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The band is performing at the venue as planned on Sunday night, they added. The gig is the final concert of a five-night run for Oasis at the stadium.
They will then head to Scotland, Ireland, Canada and the United States, before returning to Wembley for two more dates in September.
The reunion tour began at the start of July and marks the Gallagher brothers’ first performances together since Oasis split acrimoniously in 2009.
