According to UK reports the players were woken from their sleep at about 8am in the five-star Lotte hotel. Soon after guests reported seeing the track-suited players in the lobby.

It was hardly the ideal start to a day that sees Blågult take on England in the World Cup quarter-finals.

"There was an alarm, but now everything is fine, nothing serious happened" a hotel spokesperson said.

"Everything is fine with the Swedes, English, Russians, Chinese and other guests of our hotel."

Sweden will face the Three Lions at Samara Arena on Sunday (12am AEST).

The 2018 FIFA World Cup kicked off on June 14 and will continue until July 15, with the final set to be played at Moscow's Luzhniki Stadium.