LOS ANGELES -- Lindsay Lohan reportedly is speaking out.

"Access Hollywood" reported on its Web site that Lohan has proclaimed her innocence in an e-mail to the host of the show, Billy Bush.

It reads in part: "I am innocent... did not do drugs they're not mine."

The 21-year-old actress was arrested early Tuesday in Santa Monica, Calif., and released on bail for investigation of misdemeanor driving under the influence and with a suspended license and felony cocaine possession.

Her attorney said Lohan is getting "medical care."

Lohan completed a stint in rehab earlier this month and previously had checked into a recovery clinic in January.

She still faces DUI allegations connected to a Memorial Day weekend hit-and-run crash in Beverly Hills.

Tuesday Report

Actress Lindsay Lohan, who recently spent more than a month in treatment for alcoholism, was arrested in Santa Monica early Tuesday on suspicion of drunken driving and cocaine possession, police said.

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In a statement issued following Lohan's latest arrest, her attorney, Blair Berk, said, "Addiction is a terrible and vicious disease. Since Lindsay transitioned to outpatient care, she has been monitored on a SCRAM bracelet and tested daily in order to support her sobriety. Throughout this period, I have received timely and accurate reports from the testing companies. Unfortunately, late yesterday I was informed that Lindsay had relapsed. The bracelet has now been removed. She is safe, out of custody and presently receiving medical care."

The 21-year-old actress, who is already facing a drunken driving charge in Beverly Hills, was arrested at about 1:30 a.m. in the 1800 block of Main Street, near the entrance to the Santa Monica Civic Center's parking lot, said Santa Monica police Sgt. Robert Hernandez.

Lohan was booked for driving under the influence of alcohol and/or drugs, possession of cocaine, and driving on a suspended or revoked license, Hernandez said. She was released after posting $25,000 bail.

In a hastily convened news briefing outside the police station, police Lt. Alex Padilla told reporters that another motorist -- whom he described as the mother of Lohan's personal assistant -- had called police on her cell phone and alleged that the actress was chasing after her in an SUV. Padilla said the assistant had just quit hours before.

Padilla said the other motorist -- the assistant's mother -- and Lohan were in the parking lot of the Civic Center and were arguing.

"When officers arrived, they detained the parties involved in the argument," Padilla said

"One of those parties turned out to be Lindsay Lohan," Padilla said. "After officers conducted their initial investigation, they determined that she was driving her vehicle under the influence. She was arrested for driving under the influence, and transported here to the Santa Monica jail.

Police said Lohan would not take a Breathalyzer test in the field but was taken into custody after other field sobriety tests were administered.

"While in the jail, officers found in her possession a small amount of cocaine. She was charged for driving for driving under the influence, and for possession of the cocaine," Padilla said.

"She was chasing after another car," Padilla said. "The other car was being driven by the mother of her personal assistant, who had just quit her job earlier ... probably about a couple of hours before the incident occurred. She was trying to catch the mother of her personal assistant. Why she was trying to catch her, we don't know."

Lohan was accompanied by "friends of hers," Padilla said. The two passengers were questioned and released, Hernandez said.

The actress "was cooperative during the arrest," Padilla said.

Breath testing by police registered Lohan's blood-alcohol level at .12 percent and .13 percent -- over the legal limit of .08 percent, Padilla said. Hernandez said the cocaine was found in Lohan's pants pocket while she was inside the police facility.

Padilla said the actress was "following or trying to catch up to the car that's being driven by the mother of her personal assistant."

"The mother then tried to make it here to the Santa Monica Police Department," Padilla said. "She didn't make it here. She ended up in the parking lot, and that's when she called the police department on her cell phone and we responded.

"The mother was afraid," Padilla said. "She wasn't quite sure what was going on, so she called the police because she wanted to make sure everything would be OK."

Michael Lohan, the actress' estranged father, said he was worried about his daughter's behavior. In a statement issued through his attorney, Michael Lohan suggested that he and his wife, Dina, who are separated, should rally to help their daughter and place aside their own "legal battle for the good of our children."

"When we were a family, did you see any of this going on? It wasn't until we were torn apart, at the pinnacle of Lindsay's career no less, when people came into the picture, did everything fall apart," Michael Lohan told Access Hollywood. "The walls that have been put between us is what's causing this to happen."

Michael Lohan was released from prison in March after serving nearly two years for attempted assault and driving while intoxicated.

"I'm accountable for what I've done," he told Access Hollywoood. "I wound up in jail. I was arrested. It's unfortunate, but Lindsay's experiencing what I did."

Padilla handed out copies of Lohan's booking photo to reporters, and declined to reveal other details of the case.

Upon her recent release from the Promises treatment center in Malibu, Lohan had agreed to wear a alcohol-detecting anklet.

Lohan's recent stint at Promises was her second round of treatment in less than a year. In January, she checked into the Wonderland Center in Laurel Canyon after reportedly passing out in a hotel hallway after a party thrown for the Golden Globe Awards.