Brown, whose father is R&B singer
The 21-year-old Brown, who is Houston's only child, was taken to North Fulton Hospital in Roswell, a suburb of Atlanta. She is currently "still alive and breathing," Holland said.
Police were obtaining a search warrant to look through Brown's home and are talking to friends and family, Holland said.
Feb. 11 will be the third anniversary of Houston’s death. The singer had ruled the pop charts in the 1980s and 1990s before drug abuse and her tumultuous marriage to Bobbi Kristina's father took its toll. Houston was found unresponsive in the bathtub of her room at the Beverly Hilton on the eve of the
Brown, who was 18 when her mother died, was hospitalized a day after Houston's death, reportedly for stress. In a March 2012 interview with
"Sometimes it's so surreal," Brown said in the interview. "I still walk into the house like, 'Mom?' But I've accepted it."
Last January, Brown married Gordon. The marriage was criticized by some because Gordon had been informally adopted by Houston. The couple was engaged once before, in 2012, but it didn't seem to please the family, the Times reported, and the engagement was called off a month later. By July 2013, they were engaged again.
Brown defended the engagement in a Facebook post at the time, saying, "I'm tired of hearing people say 'eww your engaged to your brother or if Whitney was still alive would we be together or would she approve of this.'"
Some celebrities have taken to social media to express their angst over the situation.
Actress Jada Pinkett Smith wrote on her Facebook page: "Let's puts some prayers, light and love out there towards the daughter of our beloved Whitney Houston… Bobbi Kristina… pain can be a hell of a thing."
"Prayers for Bobbi Kristina," tweeted R&B singer Ciara, who has been vocal about Houston's influence on her career.