Colorado Republican Senator Wayne Allard has asked federal authorities to investigate three suspicious fires that have broken out in Greeley within the past week.
Two of the blazes destroyed Habitat for Humanity homes being built for families to move in this fall. A third home being renovated for the city's urban renewal authority was slightly burned.
Allard asked the director of the Bureau of Alcohol, Tobacco, Firearms and Explosives to help state and local officials investigate.
Allard himself helped build one of the destroyed homes.
Some neighbors say the fires were probably set by someone who opposes the Habitat project, out of fear the housing might hurt property values -- or because a prairie dog colony was wiped out to make room for the homes.