Tito Jackson, a founding Jackson 5 member who, along with his brothers Jackie, Jermaine, Randy, Marlon and Michael, became a teen heartthrob in the 1970s and sang hits like “ABC” and “I’ll Be There,” died, his family said. He was 70.

His death was announced in a statement early Monday by his three sons — Taj, Taryll and TJ — on an Instagram account dedicated to their music group, 3T. The statement did not say when, where or how he had died.

“Some of you may know him as Tito Jackson from the legendary Jackson 5, some may know him as ‘Coach Tito’ or some know him as ‘Poppa T,’” the statement said. “Nevertheless, he will be missed tremendously.”

The Jackson 5, one of the most popular boy bands in the United States for a brief period, were responsible for launching the solo career of Michael Jackson, who earned the title “King of Pop” and became one of the most emulated musicians of all time. The singer, songwriter and dancer died in 2009 at age 50.

The story of the Jackson 5, from their humble beginnings in Gary, Ind., to their various levels of success, has been well documented and was the subject of a five-hour mini-series in 1992 called “The Jacksons: An American Dream.”