Chemical Spill At Merck Labs

Boston Firefighters responded to a Level 3 Hazardous materials incident at the Merck Research Labs on Ave Louis Pasteur about 9:30am. A container of an unknown chemical broke open in a rook adjacent to the loading dock and causing a possible vapor explosion. Hot, warm and cold zones were established by Command and an entry team on SCBA entered the building determining no further hazard. The incident was declared under control about 11:45am