Montreal police dismantled a synthetic drug laboratory in a Griffintown condominium building Wednesday, leading to the arrest of two people and the temporary evacuation of residents from two floors.

The operation took place near the intersection of Wellington and Shannon streets and stemmed from a targeted investigation by the Montreal police force’s narcotics division.

Police say they arrested a 35-year-old man and a 33-year-old woman in connection with the investigation.

In a related development, as a precaution, residents on the building’s fourth and fifth floors were ordered to leave their units while emergency crews secured the scene.

SPVM spokesperson Jean-Pierre Brabant noted the evacuation could last multiple hours or even days as authorities work to ensure the site is safe for investigators and first responders.

One resident declared officials warned evacuees to be prepared to remain out of their homes for numerous days, describing the situation as confusing.

Furthermore, health Canada officials are likely to analyze substances seized during the raid to determine their composition.

Authorities mentioned details on the quantity and type of drugs recovered will be released at a later date.