Northumbria Police are investigating an alleged incident involving England goalkeeper Jordan Pickford in Sunderland.
A video circulated online allegedly shows the Everton player at the centre of a street brawl.
It was captured in the hours after Pickford's former club Sunderland lost to Portsmouth on penalties in the Checkatrade Trophy final on Sunday.
Northumbria Police said: "At 12:19am on Monday, April 1, police received a report of a disturbance involving a large group of individuals on Tunstall Road, Sunderland.
"Enquiries are ongoing to determine the circumstances surrounding the incident and locate those involved. Nobody is believed to have been seriously injured and no arrests have been made."
Everton had earlier confirmed they are also investigating, saying: "The club has been made aware of an alleged incident involving one of our players and we are looking into the matter."
In the video, onlookers can be heard shouting "Jordan" as a fight breaks out before the man, believed to be Pickford, is dragged away.
The 25-year-old had played in Everton's 2-0 away win over West Ham on Saturday before spending a day off in his home city.
Pickford came through the ranks with Sunderland but joined Everton for an initial £25million when the Black Cats were relegated from the Premier League in June 2017.
He made his England debut five months later and was Gareth Southgate's first choice at the World Cup, saving a penalty from Colombia's Carlos Bacca as the Three Lions went on to reach the semi-finals.
Pickford, capped 17 times, played in both of England's Euro 2020 qualifiers last month.
