Washington, Aug 17 : Michael Phelps admitted to police that he drank a beer about an hour before his car crash last Thursday, but police are saying that was not what caused the accident.

The 24-year-old was driving a Cadillac Escalade when it collided with a Honda Accord driven by a Maryland woman.

The swimmer showed no signs of alcohol impairment, and was not given a field sobriety test.

"No alcohol was involved. No drugs. It was just a car accident," People Magazine quoted a police source as saying.

Investigators found that the Accord''s driver, Amanda E. Virkus, was at fault for the crash. She will be cited for failure to obey a red light, and for causing an accident.

Phelps wont be let off easy either, he will be cited for driving with an invalid, out-of-state license.

He will have to appear in court to explain why he was driving without a valid license. (ANI)