TMZ reports that the 21-year-old was found face down in the bathtub on Saturday by her partner, Nick Gordon, who reportedly administered CPR right away.
In a statement, police in Roswell, GA., told E! News that they responded to a 911 call, stating, "When police arrived, life-saving measures were taken over until rescue personnel arrived.”
Bobbi Kristina was then taken to a hospital. The police are said to be investigating the incident.
Neither Gordon nor Bobbi Kristina's father, singer Bobby Brown, have commented about her condition.
Whitney Houston died at age 48 on February 11, 2012, after being found unresponsive in a Beverly Hills hotel bathtub and was pronounced dead at the scene.