The NFL said its Twitter feed was hacked Tuesday after a tweet was posted announcing the death of commissioner Roger Goodell.

The tweet, which was deleted minutes after it was posted, said "We regret to inform our fans that our commissioner, Roger Goodell, has passed away. He was 57. #RIP"

"We have engaged law enforcement to look into the matter. We are reviewing and strengthening our cyber-security measures," Brian McCarthy, the league's vice president of communications, said in a statement.

Goodell made light of the situation later Tuesday, posting a joke on his own Twitter account.

"Man, you leave the office for 1 day of golf w/ @JimKelly1212& your own network kills you off. #harsh," he tweeted.