Two people were arrested on Friday in connection with an armed robbery of a jewellery store. Police announced the pair — a 20-year-old man and a 16-year-old youth — were detained in the London area overnight concerning the raid on the Francis Wain shop in King's Lynn, Norfolk, a month ago. Staff had gone through a terrifying ordeal when a gang of armed robbers, one of whom was carrying a handgun and another wielding a sledgehammer, struck at the business.