Peter Yarrow, the singer-songwriter, activist and founding member of the folk trio Peter, Paul and Mary, has died at 86 after battling bladder cancer.

Peter Yarrow, who was one third of the popular 1960s folk trio Peter, Paul and Mary and co-writer of the song “Puff, the Magic Dragon” died Tuesday morning at his home in New York City “with his family by his side,

Peter Yarrow ’s cause of death has been revealed. The Peter, Paul and Mary musician died of bladder cancer, with which he was diagnosed in 2021. Yarrow, 86, died at his home in New York City on Tuesday, Jan. 7.