A major fire on Main Street is expected to cause significant traffic delays Tuesday morning. 

Winnipeg Fire Paramedic Service crews responded to a four-storey commercial/industrial building in the 800 block of Main Street shortly after 12:30 a.m.

Once on scene, crews encountered heavy smoke and flames coming from the building. Initially an interior, offensive attack was launched, but due to high heat and smoke conditions crews were forced to exit the building and transition to an exterior, defensive attack using aerial ladders and water streams.

A second alarm was called due to the potential for high life hazards and fire extension to neighbouring buildings, increasing the number of apparatus and WFPS crew members at the scene.

So far no injuries have been reported. 

As a result of the blaze, southbound traffic on Main Street will be redirected westbound onto Selkirk Avenue. Northbound traffic on Main Street has been reopened.

The road closure is expected to last well into the rush hour.