Olympic swimmer Michael Phelps was arrested on DUI charges on Tuesday after he was found over speeding.

Phelps underwent a field sobriety test that he failed, police officials confirmed. "Mr. Phelps was identified as the driver by his driver's license and appeared to be under the influence. He was unable to perform satisfactorily a series of standard field sobriety tests."

The 29-year-old Olympian confirmed the arrest and immediately issued an apology to his fans and supporters, according to ESPN.

"Earlier this morning, I was arrested and charged with DUI, excessive speeding and crossing double lane lines. I understand the severity of my actions and take full responsibility. I know these words may not mean much right now but I am deeply sorry to everyone I have let down," he said in a statement via Twitter.

The United States Olympic Committee CEO Scott Blackmun released an official statement to US Weekly following the incident.

"We were surprised by today's news. We are disappointed on a number of fronts, but want to give Michael Phelps and USA Swimming an opportunity to comment before saying anything more."

The USA Swimming also released a statement following Phelps' arrest and said, "The news regarding Michael Phelps and his actions are disappointing and unquestionably serious. We expect our athletes to conduct themselves responsibly in and out of the pool."

Meanwhile, this is not the first time that Phelps was arrested on DUI charges, CBS Local noted.

Back in November 2004 when he was only 19 years old, Phelps was also arrested with the same charges. At that time, he pleaded guilty to drunk driving and was sentenced to 18 months of probation.

At the time of his sentence, Phelps apologized to the judge and said, "I recognize the seriousness of this mistake. I've learned from this mistake and will continue learning from this mistake for the rest of my life."