Story highlights Bobbi Kristina Brown has been placed in a medically induced coma, a source says

Daughter of singer Whitney Houston was found in a bathtub full of water, police say

Her mother died after being found in a tub at a California hotel in 2012

(CNN) Whitney Houston's daughter Bobbi Kristina Brown was placed in a medically induced coma Saturday after being found facedown and unresponsive in a bathtub full of water, a source close to the family has told CNN legal analyst Sunny Hostin.

Brown, 21, "was not breathing" when a man identified as her husband and a friend found her at about 10:25 a.m. inside her townhouse in Roswell, Georgia, said police in the Atlanta suburb. They called 911 and performed CPR until public safety officers arrived and took over, said police spokeswoman Lisa Holland.

Brown was taken to North Fulton Hospital, where "she is still alive and breathing. Other than that, I don't know her condition," Holland said Saturday afternoon at a press briefing.

Nobody knows what caused Brown's unresponsiveness, Holland said, but police consider it a medical incident at this time. She said investigators had found nothing to indicate it was drug- or alcohol-related.

Police had been to the residence recently. Somebody reported a fight there January 23, but nobody answered the door and officers found no evidence of an altercation, Holland told CNN.

Read More