PITTSBURGH -- Rashard Mendenhall has created a stir with comments made on his official Twitter page regarding Osama bin Laden's death.

The Pittsburgh Steelers running back on Monday tweeted: "What kind of person celebrates death? It's amazing how people can HATE a man they have never even heard speak. We've only heard one side..."

Mendenhall didn't hold back, even making a reference to the Sept. 11 attacks.

"We'll never know what really happened. I just have a hard time believing a plane could take a skyscraper down demolition style," he tweeted.

Mendenhall has since deleted his 9/11-related tweet.

The Steelers felt compelled to act. On Tuesday, team president Art Rooney II released a statement.

"I have not spoken with Rashard, so it is hard to explain or even comprehend what he meant with his recent Twitter comments. The entire Steelers organization is very proud of the job our military personnel have done and we can only hope this leads to our troops coming home soon."

Mendenhall, who profiles himself as a "conversationalist and professional athlete" on his Twitter page, turned some heads in March, as well, when he supported a comment by Minnesota Vikings running back Adrian Peterson comparing the NFL to "modern-day slavery."

"Anyone with knowledge of the slave trade and the NFL could say that these two parallel each other," Mendenhall posted at the time.

Mendenhall is coming off a tremendous season, as he led the AFC champions in carries (324), rushing yards (1,273) and rushing touchdowns (13). He has 2,439 yards in three seasons since being drafted in the 2008 first round out of Illinois.