David Cameron unveiled a memorial to a similar massacre in the Indian city of Amritsar . New Delhi ( CNN ) English : ` ` We will never forget what happened here '' British prime minister stops short of a formal apology for the colonial - era massacre . Hundreds of people were killed when British police opened fire on unarmed protesters .
David Cameron unveiled a memorial to a similar massacre in the Indian city of Amritsar . English : ` ` We will never forget what happened here '' British prime minister stops short of a formal apology for the colonial - era massacre . Hundreds of people were killed when British police opened fire on unarmed protesters .