LOS ANGELES — Joni Mitchell was in intensive care in a Los Angeles-area hospital on Tuesday, according to the Twitter account and website of the folk singer and Rock and Roll Hall of Famer.

“Joni was found unconscious in her home this afternoon,” said a statement on the Mitchell website. “She is currently in intensive care undergoing tests and is awake and in good spirits.”

It wasn’t immediately clear what illness she had.

Los Angeles fire officials said paramedics answered an afternoon 911 call in Bel Air, where Mitchell lives, and took a patient to the hospital. But they could not verify her identity or give details on her condition.

The 71-year-old singer-songwriter told Billboard magazine in December that she has a rare skin condition, Morgellons disease, which prevents her from performing. Still, she released a career-spanning four-disc box set last year and appeared at Clive Davis’ annual pre-Grammy party in February.