Controlled explosion outside Buckingham Palace as man arrested over ‘shotgun cartridges’ thrown into grounds Posted on May 3, 2023 By Charlielikes A man has been arrested outside Buckingham Palace after throwing what is suspected to be shotgun cartridges into palace grounds, police have said. news Tags:– as, arrested, buckingham, cartridges, controlled, explosion:, grounds, into’, man, news, outside, over”, palace’, shotgun, thrown, topnews, trending