Police have arrested 37 people and seized more than 100 weapons in an investigation of arms dealing over the Internet, officials said Friday. Metropolitan police said they raided 47 homes in London in a four-day operation. The seized weapons including three machine-guns, 86 handguns, 10 rifles, seven shotguns and 13 stun guns, along with silencers, laser sights and 5,000 rounds of ammunition. "This is the climax of a long-term intelligence operation where we have identified weaponry purchased over the Internet," said Tarique Ghaffur, assistant commissioner of the force. "I am delighted by its success, and the sheer number of firearms, ammunition and other weapons seized will make London a safer city," Ghaffur said.