Bobbiy Kristina Brown should not trust anyone at this time, Bobby Brown's sister, Leolah, has told the media.

Leolah Brown spoke for the first time since Whitney Houston's death on Feb. 11 and it was a warning to Bobbi Kristina. Bobbi Kristina, 18, is the only daughter for singers Bobby Brown and Whitney Houston. Houston died in a bathtub at the Beverly Hilton Hotel earlier this month.

I am concerned about my niece Bobbi Kristina, yes, Leolah told Access Hollywood. Krissy is not safe right now. I want to say to Krissy that it's very, very, very important that she does not trust anybody at this time.

Leolah said that Bobbi Kristina should not trust anyone except her, her father and her grandmother Cissy Houston.

And I mean that, Leolah Brown said. Right now is the time to just really shut the door.

Neither Leolah nor her attorney, Reginald Mason, specified why Bobbi Kristina must remain cautious or if anyone wanted to harm her.

Instead, Mason said that there are people who may possibly want to take advantage of Bobbi Kristina in her current state.

Bobby Kristina was hospitalized for stress and anxiety the day after her mother died.