LOS ANGELES - Beverly Hills, Calif., police say detectives are investigating after pop icon Whitney Houston died in her room on the fourth floor of the Beverly Hilton.


Beverly Hills police Lt. Mark Rosen told reporters outside the Beverly Hilton that Houston was pronounced dead at 3:55 a.m. in her room on the fourth floor of the hotel. Her body remained there and Beverly Hills detectives were investigating.


"There were no obvious signs of any criminal intent at this time," Rosen said.


Houston's publicist, Kristen Foster, said Saturday that the cause of her death is unknown.


Rosen said police received a 911 call from hotel security about Houston at 3:43 p.m. Saturday. Paramedics who were already at the hotel because of a Grammy party unsuccessfully tried to resuscitate the singer, he said.


Houston's death came on the eve of music's biggest night -- the Grammy Awards. It's a showcase where she once reigned, and her death is sure to case a heavy pall on Sunday's ceremony.


Two days ago, she performed at a pre-Grammy party with singer Kelly Price.