US civil rights leader Dolores Huerta has died at the age of 96, her family has announced.

Huerta campaigned alongside fellow labour leader Cesar Chavez for farm workers’ rights in the 1960s and 1970s, founding the United Farm Workers Union (UFW) with him.

Through her foundation, Huerta had continued her activism work addressing immigration and voting issues.

“As you can imagine, this is an incredibly difficult time for us, and we ask for privacy as we grieve this incredible loss to our family,” family spokesman Erik Olvera said on Wednesday.

Earlier this year, Huerta said Chavez, who died in 1993, had “manipulated and pressured” her into having sex and on another occasion forced her in the 1960s.

That was after the New York Times published an investigation detailing allegations from Huerta and two other women, who said Chavez groomed and sexually abused girls involved in the labour movement.

Huerta said the two encounters with Chavez resulted in pregnancies that she chose to keep these secret, arranging for the children to be raised by other families.

Chavez’s family said in a statement at the time that they were “devastated” by the reports and praised the women’s “courage to come forward”.

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