A football fan was taken to hospital in what was said to be a “serious condition” after falling from the stands at Wembley stadium during England’s match against Croatia on Sunday afternoon.
A spokesperson from the stadium and Uefa said that the spectator fell just after kick-off and was given medical attention at the ground before being taken to hospital.
The Wembley spokesperson added: “The spectator was given on-site medical attention and was then taken to hospital in a serious condition.
“We will continue to work with Uefa to ensure the matter is fully investigated, and we are continuing to monitor the situation.”
England went on to beat Croatia 1-0 in the match, the first time they have won the opening game of a European Championship.
Watch: England make winning start
On Saturday the Euro 2020 competition faced another medical emergency when the match between Denmark and Finland had to be suspended after the Danish player Christian Eriksen collapsed on the pitch with a cardiac arrest.
The 29-year-old midfielder was resuscitated on the pitch and taken to hospital where he regained consciousness. The game resumed, with Finland winning 1-0.