07/16/2009 at 08:10 PM EDT
has been placed under involuntary psychiatric hold, Access Hollywood
reports, citing a source.
According to Access
, the 23-year-old actress is at Cedars-Sinai Medical Center in Los Angeles.
Her rep declined to comment on the report, but tells PEOPLE: "Mischa has been hospitalized per the recommendation of her doctor and is resting in the hospital."
On Wednesday, Barton called police at 3 p.m. with a health problem, LAPD Officer April Harding confirmed to PEOPLE. "We assisted her with a medical issue and removed her from her home," says Harding. She adds that no paramedics were involved and no arrests were made, but confidentiality laws prevent her from revealing details about Barton's condition.
The star's rep, Craig Schneider, tells PEOPLE that police were only needed to protect the former O.C.
star from the media as she was transported to her doctor.
Additional calls to the police, the hospital and Barton's rep were not immediately returned.
Reporting by LISA INGRASSIA and HOWARD BREUER