The Saint John Fire Department are at the scene of a chemical spill at the Red Rose Tea Building.
Deputy Fire Chief Mark Gillen tells CHSJ news the source of the spill was a ruptured container on the third floor.
About 20 litres of the product that displaces oxygen was released into the building.
Gillen adds they are putting together a plan to ventilate the building and they should know in about an hour if the occupants can back in today.
City police have traffic blocked at Union and St. Patrick Streets,
St. Patrick and Smythe Streets and at Smythe Street and Station Street.