American ice hockey player Adam Johnson, who appeared in 13 NHL games with the Pittsburgh Penguins, has died after a "freak accident" during a game in England.

The 29-year-old Minnesota native was playing for the Nottingham Panthers in a Challenge Cup game against the Sheffield Steelers when he suffered a slashed neck during the second period of the game at Sheffield's Utilita Arena on Saturday.

"The Nottingham Panthers are truly devastated to announce that Adam Johnson has tragically passed away following a freak accident at the game in Sheffield last night," the team said on Sunday.

"The Panthers would like to send our thoughts and condolences to Adam's family, his partner, and all his friends at this extremely difficult time. Everyone at the club including players, staff, management and ownership are heartbroken at the news of Adam's passing."

Johnson spent 13 games over parts of the 2018-19 and 2019-20 seasons playing for the Pittsburgh Penguins in the National Hockey League before spending the 2020-21 season in Sweden with the Malmo Redhawks. He had a goal and three assists for the Penguins.

"The Pittsburgh Penguins join the entire hockey world in mourning the life of Adam Johnson, whose life tragically ended far too soon," the Penguins said in a statement. "Adam will always be part of the Penguins family."

Johnson had joined Nottingham for the 2023-24 campaign. "The Panthers would like to thank everyone who rushed to support Adam last night in the most testing of circumstances," the club said.

"Adam, our number 47, was not only an outstanding ice hockey player, but also a great teammate and an incredible person with his whole life ahead of him. The club will dearly miss him and will never ever forget him."

The UK Elite League announced the three games scheduled for Sunday in Belfast, Fife and Guildford have been postponed following Johnson's death.