Investigators sift through debris at deadly Las Vegas fire

Investigators were going room-by-room Monday at a downtown Las Vegas apartment building where six people were killed and 13 injured in a fire over the weekend to determine what started the blaze.City officials said at a news conference Monday morning that investigators were also looking into claims from some residents that smoke or fire alarms weren't working properly and some residents were using stoves to stay warm because the building didn't have heat.Las Vegas City Councilman Councilman Cedr