NEW : Scene is now safe , Boston police say . Two people , including the man who lost his hands , were taken to a hospital , and three others were treated at the site in the Hyde Park neighborhood for unspecified injuries , Boston police said . Four other people are treated for injuries , police say . A man said he was experimenting with chemicals , an official tells a newspaper . The incident happened at the home of one of the suspects in the bombings.
NEW : Scene is now safe , Boston police say . Four other people are treated for injuries , police say . A man said he was experimenting with chemicals , an official tells a newspaper . The incident happened at the home of one of the suspects in the bombings.