Rejecting the regret expressed by British Prime Minister Theresa May as "inadequate", Punjab Chief Minister Amarinder Singh on Friday demanded "an unequivocal official apology from Britain" for the Jallianwala Bagh massacre, whose centenary is being observed on Saturday (April 13).

Terming the tragic event as "a heart-wrenching moment in India's history", Amarinder said that the people of India wanted an unequivocal apology from Britain for the atrocity.