MONROE, Conn. (AP) — Authorities say a chemical fire at a research lab in Connecticut injured two lab employees.

The fire was reported Monday at Axel Plastics Research Laboratories in Monroe. A sprinkler system extinguished the flames before firefighters arrived.

Two employees were taken to a hospital for treatment. Their current conditions are unclear.

The cause of the fire is being investigated by the fire marshal's office and the state Department of Energy and Environmental Protection.