Canadian singer Denny Doherty, from the 1960s folk-pop group the Mamas and the Papas, has died at the age of 66.
Denny Doherty (l) with the other Mamas and the Papas
He died at his home near Toronto after a short illness, relatives said.
The Mamas and the Papas shot to fame in the late 1960s with hits characterised by soaring harmonies - including California Dreamin' and Monday, Monday.
The group also featured chief songwriter John Phillips, his wife Michelle and female vocalist "Mama Cass" Elliot.
Denny Doherty was born in Halifax, Nova Scotia, on 29 November 1940.
He was already well established on the folk music scene when he joined the Mamas and the Papas on their formation in 1965.
The group recorded four albums before breaking-up in 1969.
The band sold an estimated 20 million albums but relationships among its members were undermined by jealousy and drug use, correspondents say.
Doherty went on to pursue a solo career in music as well as playing the Harbourmaster and voicing all the characters for the children's television series Theodore Tugboat.
He had been suffering recently from a number of complaints, including an abdominal aneurysm and had been put on dialysis for kidney problems, his sister told Canadian Press news agency.
Michelle Phillips is the only surviving member of the Mamas and the Papas.
"Mama Cass" Elliot died in 1974 aged 32 while John Phillips died in 2001 aged 65.