Adam Schefter reports on the measures the NFL is taking to find out who hacked the league's Twitter account to erroneously say commissioner Roger Goodell had died. (1:33)

The NFL said its Twitter feed was hacked Tuesday after a tweet was posted announcing that commissioner Roger Goodell had died.

"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.

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"

A screengrab of the tweet that the NFL said was posted by a hacker. Twitter

McCarthy earlier confirmed on his owner Twitter page that Goodell "is alive and well."

Shortly after the original tweet about Goodell was deleted from the league's official account, two other tweets the league said didn't come from its office were posted on the page. Those tweets also were deleted.

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 pic.twitter.com/BvtBVzdYTc — Roger Goodell (@nflcommish) June 7, 2016

Goodell has been the NFL's commissioner since 2006.