Several NFL-affiliated Twitter accounts were hacked on Monday and the league is now cooperating with law enforcement, the NFL announced in a statement on Tuesday.
"On Monday, the NFL cybersecurity department became aware of a breach of a league-related social media account," the league said. "Targeted breaches and additional failed attempts were discovered across the league and team accounts. The NFL took immediate action and directed the teams to secure their social media accounts and prevent further unauthorized access."
The operation was conducted by OurMine, a Saudi hacking service that also sells proprietary cybersecurity services. OurMine claimed ownership over the hacks in a series of tweets.