3:45 p.m.LOS ANGELES — Michael Jackson, the moonwalking former child star who became known the world over as the “King of Pop” before his life and career deteriorated in a freakish series of scandals, died Thursday, a person with knowledge of the situation told The Associated Press. He was 50.

The person said Jackson died in a Los Angeles hospital. The person was not authorized to speak publicly and requested anonymity.

The circumstances of his death were not immediately clear. Jackson was not breathing when Los Angeles Fire Department paramedics responded to a call at his Los Angeles home about 12:30 p.m., Capt. Steve Ruda told the Los Angeles Times. The paramedics performed CPR and took him to UCLA Medical Center, Ruda told the newspaper.

Jackson’s death brought a tragic end to a long, bizarre, sometimes farcical decline from his peak in the 1980s, when he was popular music’s premier all-around performer, a uniter of black and white music who shattered the race barrier on MTV, dominated the charts and dazzled even more on stage.

He was perhaps the most exciting performer of his generation, known for his feverish, crotch-grabbing dance moves, his high-pitched voice punctuated with squeals and titters. His single sequined glove and tight, military-style jacket were trademarks second only to his ever-changing, surgically altered appearance. Over the years, his skin became lighter and his nose narrower.

3:15 p.m. update — Entertainment Web site TMZ.com and also the Web site for the Los Angeles Times is reporting that Michael Jackson has died of a heart attack this afternoon in Los Angeles.

3 p.m. update — LOS ANGELES — Michael Jackson has been rushed to the hospital, a fire department official told the Los Angeles Times.

Capt. Steve Ruda said Thursday that Jackson was not breathing when Los Angeles Fire Department paramedics responded to a call at his Los Angeles home about 12:30 p.m. The paramedics performed CPR and took him to UCLA Medical Center, Ruda told the newspaper.

L. Londell McMillan, a lawyer for Jackson, did not have any information. Messages left for other Jackson associates were not immediately returned.

The hospitalization was first reported by the Web site TMZ.

The emergency entrance at the UCLA Medical Center, which is near Jackson’s rented home, was roped off Thursday with police tape.

News trucks were gathered, helicopters flew overhead, and orange cones were laid out to redirect traffic.

“We have no statements as far as transporting Michael Jackson,” Los Angeles Fire Department spokesman Devin Gales said.

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Associated Press entertainment reporters Derrik Lang and Anthony McCartney and special correspondent Linda Deutsch in Los Angeles and music writer Nekesa Mumbi Moody in New York contributed to this story.