MEADE, Colo. -- Three men were taken to the hospital after an explosion and fire Wednesday evening.

Employees at Boulder Scientific Company in Mead, Colo. were mixing ether-based chemicals when an explosion occurred, a spokesman for Mountain View Fire Department said.

Investigators from a variety of agencies ruled the cause of the explosion as accidental.

Employees at Boulder Scientific Company has just finished filtering product and were cleaning some filters with an ether-based product.

The employees had walked away from the filters and then noticed smoke coming from one of them and went to investigate. Just as one of the employees got to the filter, an explosion occured.

The three men were taken to Longmont United Hospital with minor injuries to their faces, spokesman Jesse Hodgson said.

The explosion happened in the research area of the facility.

Hodgson said the fire was confined to one room, thanks in part to the company's own fire supression equipment.

"The supression system they have is compatible with most of the chemicals they're working with," Hodgson said. "So if a problem happens, like a fire or explosion, their suppression equipment will engage and keep the fire under control until we can get there and take care of it."

Boulder Scientific is a chemical manufacturing company. When contacted by 7NEWS, a night supervisor would only say, "the operation is stable."

The explosion caused extensive damage but a dollar amount was not available.

Names of the injured employees were not released.