The incident reportedly left 50 others injured.
Prime Minister Narendra Modi and Union Home Minister Rajnath Singh have mourned the loss of lives in the mishap.
"Deeply saddened by the loss of lives in the stampede in Varanasi. Condolences to the bereaved families. Prayers with those injured," Modi tweeted.
He said: "I have spoken to officials & asked them to ensure all possible help to those affected due to the stampede in Varanasi."
Singh also mourned the loss of lives in the incident and tweeted: "Deeply pained at the loss of lives due to stampede at Varanasi. My condolences to the families of the deceased & prayers with the injured."
"Spoke to Commissioner of Varanasi who apprised me of the situation.I asked him to provide all possible help to those affected by the tragedy," he said.
The incident occurred when followers of Jai Gurudev had gathered at the bridge, reports said.
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