(CNN) -- Entertainer Michael Jackson has died after being taken to a hospital on Thursday after suffering cardiac arrest, according to multiple reports including the Los Angeles Times and the Associated Press. CNN has not confirmed his death.
Jackson, 50, had been in a coma at the hospital, sources told CNN.
Brian Oxman, a Jackson family attorney, said he was told by brother Randy Jackson that Michael Jackson collapsed at his home in west Los Angeles, California, Thursday morning.
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Family members were told of the situation and were either at the hospital or en route, Oxman said.
Fire Capt. Steve Ruda told CNN a 911 call came in from a west Los Angeles residence at 12:21 p.m.
Ruda said Jackson was treated and transferred to the UCLA Medical Center.
Asked specifics of the patient's condition, he said he could not discuss them because of federal privacy laws.
The music icon from Gary, Indiana, is known as the "King of Pop." Jackson had many No. 1 hits and his "Thriller" is the best-selling album of all time.
Jackson is the seventh of nine children in a well-known musical family. He has three children, Prince Michael I, Paris and Prince Michael II.
At the medical center, every entrance to the emergency room was blocked by security guards. Even hospital staffers were not permitted to enter. A few people stood inside the waiting area, some of them crying.
A large crowd was also gathering outside the hospital, according to video footage.
Outside Jackson's Bel Air home, police arrived on motorcycles. The road in front of the home was closed in an attempt to hold traffic back, but several people were gathered outside the home.