Tito Jackson, one of the founding members of the influential Motown group Jackson 5, has died. He was 70 years old.

Jackson’s death was announced late Sunday by his three sons. They did not disclose a cause of death but said they were “shocked, saddened and heartbroken.” Jackson’s representatives did not immediately respond to The Times’ request for comment on Monday.

“Our dad was an incredible man who cared about everyone and their well-being,” sons Taj, Taryll and TJ said in a statement on Instagram. “Some of you may know him as Tito Jackson of the legendary Jackson 5, others may know him as ‘Coach Tito’ or still others may know him as ‘Poppa T.’ However, he will be terribly missed. For us, it will always be ‘Tito time.’ Please remember to do what our dad always preached and that is ‘Love one another.’ We love you, Pops.”

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Jackson, born Toriano Adaryll Jackson on October 15, 1953, was one of seven siblings of the late King of Pop Michael Jackson and superstar Janet Jackson. He was a founding member of the successful Jackson 5, who came together in the 1960s under the tutelage of domineering patriarch Joe Jackson and then caught the attention of Motown Records founder Berry Gordy Jr. After being introduced to the nation by Diana Ross, they released the popular “bubblegum soul” singles “ABC,” “I Want You Back” and “I’ll Be There.”

Together with brothers Jackie, Jermaine, Marlon and Michael, the family group sparked “Jacksonmania” that swept the nation. The group was nominated for three Grammy Awards. The hitmakers were inducted into the Rock & Roll Hall of Fame in 1997. At the ceremony, Gordy paid tribute to them, saying that the group had given “black kids from the ghetto a license to dream.”

A few days before his death, the “One Way Street” singer wrote on Instagram about his visit to a memorial dedicated to Michael Jackson in Munich and his gratitude for “this special place that not only honors his memory, but also our shared legacy. Thank you for keeping his spirit alive.”

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This story originally appeared in the Los Angeles Times.