Riot victims Nirpreet Kaur, Jagdish Kaur and others were on indefinite fast for the past six days against the acquittal of Congress leader Sajjan Kumar in a 1984 riots case.
Protesters said the health of the fasting persons deteriorated and the top religious heads advised them to call off their strike.
They ended their fast after taking a glass of juice from Shiromani Gurdwara Parbandhak Committee (SGPC) chief Avtar Singh in the afternoon.
Singh appealed to Kaur to immediately call her fast off in view of Sikh tenets and said the entire Sikh community was with her in this hour of crisis.
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He hoped they all would succeed in their mission to prevail upon the Centre to punish the guilty of '84 riots and help get justice for the victims of this tragedy.
A Delhi court on April 30 had acquitted Kumar in a '84 anti-Sikh riot case in which he was accused of murder and of instigating a riotous mob that killed five Sikhs in Delhi's cantonment area.
The Congress leader's acquittal led to protests from the Sikh community, who were demanding reopening of the case against him along with action against others guilty of riots.