In the visitor's book, Rahul wrote that the cost of freedom must never be forgotten.
"The cost of freedom must never ever be forgotten. We salute the people of India who gave everything they had for it. Jai Hind," he wrote.
The massacre took place on 13 April 1919 when troops of the British Indian Army under the command of Colonel Reginald Dyer fired machine guns into a crowd of unarmed protesters and pilgrims who had gathered in Jallianwala Bagh in Punjab's Amritsar on the occasion of Baisakhi.
The crowd had assembled peacefully at the venue to condemn the arrest of two national leaders -- Satya Pal and Saifuddin Kitchlew -- when they were fired at indiscriminately by General Dyer and his men.
According to British government records, 379 people including men, women, and children were killed while 1,200 were wounded in the firing. Other sources place the number of dead at well over 1,000.
"The tragedy of Jallianwalla Bagh in 1919 is a shameful scar on the British-Indian history. As her Majesty, the Queen said before visiting Jallianwala Bagh 1997, it is a distressing example of our past history with India. We deeply regret what happened and the suffering caused," May had said at the British Parliament earlier this week.
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