Police said Saturday someone in Whitney Houston's entourage found the singer unresponsive in her Beverly Hills hotel room and it was unclear who reported that to hotel staff.

Beverly Hills Lieutenant Mark Rose told People police received a call from hotel security at 3:43 p.m. and police responded minutes later. She was pronounced dead at 3:55 p.m.

"Someone in her entourage found her unresponsive in her room ... It's unclear who notified hotel staff because she has quite an entourage here at the hotel. We attempted to resuscitate her, to no avail," Rosen said.

He said that "[A]t this time, there's no obvious evidence of foul play or cause of death.

Houston's bodyguard found Houston, said Courtney Barnes, a publicist for rapper Ray J, who was dating the star, according to CNN.

Houston was set to perform at a pre-Grammy party on Saturday night.

Houston was seen in Hollywood Thursday night for a Grammy party, according to TMZ. The news site reported her final performance was a rendition of "Yes Jesus Loves Me."