Security concerns at Buckingham Palace ahead of coronation

A man with a knife was arrested outside Buckingham Palace on suspicion of possessing an offensive weapon after throwing what appeared to be shotgun cartridges onto the grounds. The incident was not believed to be terrorism-related, and security will be enhanced ahead of the coronation of King Charles III on Saturday. No specific threats have been reported, but officials have asked people to report anything unusual they see at coronation-related sites.