Hundreds of people were killed by British troops on this day in 1919 as they fired indiscriminately on an unarmed gathering of thousands who had assembled in Jallianwala Bagh in Punjab amid nationwide protests against the Rowlatt Act which had extended wartime repressive measures. 

"Tributes to those martyred in the Jallianwala Bagh massacre. Their courage, heroism and sacrifice gives strength to every Indian," Modi said.