Jordan Strauss / Invision / Invision/AP 1 / 9
Jordan Strauss / Invision / Invision/AP 1 / 9

Bobbi Kristina Brown, the daughter of Whitney Houston and Bobby Brown, was found unresponsive in a bathtub after an apparent drug overdose, a source exclusively tells ET, and has been placed on a ventilator. Her family is with her at the hospital, according to police.

While the same source says this was not a suicide attempt, another person close to the family told ET earlier today that it was "no coincidence" Brown was found under circumstances similar to those of her mother's death nearly three years ago.

On Saturday morning, Roswell, Ga., police responded to a 911 call and arrived at Brown's home at 10:25 a.m.

In a statement Officer Lisa Holland said police administered life-saving measures until she could be transported to a hospital. "Her husband and a friend located her in a bath tub this morning and she was unresponsive. He started CPR and a police officer took over life-saving measures until an ambulance arrived. She was transported to the hospital. Please keep her and the family in your thoughts and prayers."

NEWS: Bobbi Denies Drug Photo

Brown, 21, was alive when taken to North Fulton Hospital where she has since been stabilized. "She's still breathing; she is alive," Holland said in a press conference held later in the afternoon. The officer did not offer any additional information about Brown's state.

Local police have a search warrant and are sweeping the house for drugs as they continue their ongoing investigation. "We are interviewing all the family members and friends that were at the house at the time," Holland also said in the same press conference. "... We don't know that if it was an accident or what this could be."

Brown's mother, Houston, died of accidental drowning on Feb. 11, 2012. The effects of heart disease and cocaine use also contributed to her death. And Brown's incident comes two weeks after Lifetime aired the Angela Bassett-directed biopic, "Whitney."

NEWS: Bobbi Previously Rushed to Hospital

Bobby Brown, who was not in Atlanta at the time of the incident, is on his way to be with his daughter. ET reached out to his rep, who has no comment at this time.