Hackers used the official SEC Twitter account to post a couple images of scantily clad women Saturday morning.
"We became aware of it when we saw some retweets," SEC spokesman Herb Vincent said in a statement. "The images were removed immediately, our password changed and we notified Twitter. We will, of course, continue to monitor the account closely today."
Earlier this month, the NFL's Twitter account was hacked, with three unauthorized messages appearing in the league's timeline, including a statement that commissioner Roger Goodell had died. A very much alive Goodell joked about it later in the day.
The NFL said it was strengthening its online security and contacting law enforcement.