LOS ANGELES (AP) -- Paris Hilton was arrested early Thursday for investigation of driving under the influence after she was spotted in Hollywood "driving erratically," police said.

Hilton was arrested shortly before 12:30 a.m., said police Officer I. Isabella.

"The officers observed that Hilton exhibited the symptoms of intoxication. A field sobriety test was conducted at scene, and the officers determined she was driving under the influence," Isabella said, reading from a police statement. He said officers stopped Hilton because she was "driving erratically."

Hilton, 25, was booked on suspicion of misdemeanor DUI and released on her own recognizance, he said.

Her spokesman, Elliot Mintz, confirmed the arrest and said she had the minimum blood-alcohol level to warrant an arrest. The legal limit in California is 0.08.

TMZ reports that Paris claims to have had a single drink -- a margarita -- the entire evening and shortly thereafter she was stopped.