Chris Brown was thrown out of the Malibu rehab facility Friday for violating 3 internal rules ... including a special rule imposed specifically on him -- STAY AT LEAST 2 FEET FROM THE WOMEN.
Sources familiar with the situation tell TMZ ... the rehab facility imposed the 2-foot rule because of the Rihanna case -- specifically, that he beat her. The people who run the facility imposed the highly unusual rule, and we're told Chris violated it by touching elbows and hands with a woman.
As for the 2 other violations, we're told Chris left the facility last week on an authorized outing, but when he returned he was told to submit to a random drug test and he refused. Our sources say he later took the test and the results were negative, but the initial refusal was a violation of rules.
And the third violation ... the facility claims Chris made a mockery of rehab during a group session with some harsh comments.
Our sources say Chris was also in some sort of sexual encounter with a woman at the facility at the beginning of the month, but for some reason that is not part of the basis for booting him.
TMZ broke the story ... Chris was arrested Friday because he violated the order of the judge in the Rihanna case ... the judge required him to stay in rehab for anger management until mid-April, when his Washington D.C. assault case ran its course.
He's currently being held in jail without bail. His lawyer, Mark Geragos, will appear in court Monday with Brown in an attempt to get him freed. We're guessing Geragos will ask for house arrest until the D.C. trial.