An ambulance arrived at Jackson's Calabasas home and took her to a nearby hospital for evaluation.
TMZ was told the 911 caller reported a possible drug overdose and several cuts on her wrist.
Hours before the call was made, Jackson posted ambiguous tweets that may have shown signs of trouble:
i wonder why tears are salty ?— Paris Jacksoη (@ParisJackson) June 5, 2013
yesterday , all my troubles seemed so far awaynow it looks as though they're here to stay— Paris Jacksoη (@ParisJackson) June 5, 2013
According to a source close to TMZ, Jackson "tried this in the past" but "this was far more serious. It was not a cry for help."
It's being reported that she's currently doing OK.