The Buckingham

Photo Credit: www.celebuzz.com

Kelly Osbourne is still in the hospital after suffering a seizure earlier in the week.

The Fashion Police star Tweeted on March 7 that doctors were still trying to figure out why she had a seizure on the set of her show earlier in the day.

“She is scheduled to have more tests.  But she has not had another seizure since she was admitted,” a source told PEOPLE.  They also added that Osbourne, 28, is on medication.

TMZ has said that Osbourne could possibly have epilepsy, which causes seizures, but her rep has said that that may not be the case.