CSU Equine Reproduction Lab Fire Ruled 'Undetermined'

FORT COLLINS, Colo. (CBS4) - The Bureau of Alcohol, Tobacco, Firearms and Explosives has not been able to figure out the cause of a fire at a Colorado State University lab.

The ATF is closing its investigation.

The fire at the Foothills Campus destroyed the school's equine reproduction lab. A spokesman for the ATF says there is not enough evidence to officially declare the fire an accident.

The cause will be ruled "undetermined."

Nobody was hurt in the fire.