Updated

Britain's prime minister has laid a mourning wreath at the site of a notorious 1919 massacre of hundreds of Indians by British colonial forces.

David Cameron's action Wednesday marked the first time a British premier made such a gesture of condolence at Jallianwala Bagh in the northwest city of Amritsar.

The park was the site of an attack by British colonial troops on unarmed Indians attending a rally. More than 300 Indians were killed during the massacre, which galvanized the national independence movement. Many see the killings as the beginning of the end of Britain's rule over the Indian subcontinent.

Queen Elizabeth II visited the same site in 1997 and laid a wreath there. She called the killings "distressing."