Explainer |

What happened in the 1919 Jallianwala Bagh massacre of Sikhs in British-ruled India?

• British police are holding a 19-year-old man who broke into Windsor Castle where Queen Elizabeth was spending Christmas
• He purportedly made a video claiming he was an Indian Sikh who would attempt to ‘assassinate’ the monarch as revenge for the Jallianwala Bagh incident