More than a dozen teams in the US National Football League have had their social media accounts hacked.
The teams included the San Francisco 49ers and Kansas City Chiefs, who will compete in the Super Bowl Championship on 2 February.
The hacking group OurMine took responsibility for the attack, which said it was to show internet security was “still low” and had to be improved.
The NFL did not respond to a request for comment about the attack.
The Twitter, Facebook and Instagram accounts for 15 teams were compromised.
Twitter confirmed the accounts were hacked by a third-party platform.
“As soon as we were made aware of the issue, we locked the compromised accounts and are working closely with our partners at the NFL to restore them.”
Many accounts had the same message posted: “Hi, we’re back. We are here to show people that everything is hackable.”
Some of the accounts had their profile pictures or headers changed or deleted.
The OurMine Twitter account was taken down on Monday.
