London - The only son of late British poet Ted Hughes and his American wife, Sylvia Plath, has committed suicide at his home in Alaska, the London Times newspaper reported Monday.

Nicholas Hughes, 47, had been battling depression for some years, his sister, Frieda, was quoted by the paper as saying.

The death adds a further tragic chapter to the sad life story of Hughes and Plath, who gassed herself aged 30 in the couple's London flat when Nicholas and Frieda were young children.