ROCHESTER, N.Y. (AP) — Authorities say a chemical spill inside a western New York commercial building has sent three people to the hospital with serious injuries.

Firefighters in the Rochester suburb of Henrietta say the caustic chemical MDI spilled Monday morning when workers were moving equipment. The chemical can cause respiratory and skin irritation.

The Democrat and Chronicle reports three people were sent to a local hospital with suspected respiratory injuries that were considered either serious or life-threatening.

About 50 people were evacuated from the building, occupied by a company that makes window and door products. MDI is used in flexible foams such as weatherstripping.

The spill was contained and authorities say there is no threat to the public.

The full name of MDI is methylene diphenyl diisocyanate.