A three-alarm fire that broke out on an upper floor of St. Michael’s Hospital in downtown Toronto on Tuesday afternoon has been extinguished.

According to Toronto fire division commander Andrew Kostiuk, the fire broke out in an electrical room on the 12th floor of the Cardinal Carter Wing and the room's sprinkler systems extinguished most of the fire before emergency crews arrived.

View of smoke coming from St. Michael's Hospital

A view from Shuter and Victoria streets shows smoke coming from the hospital. (@RachTags/Twitter)

There were no injuries and no patients needed to be transferred or evacuated from the building. 

"Luckily the electricians at the hospital were able to minimize the areas they had to shut power off to," said Kostiuk.

Fire crews are now monitoring the electrical equipment with thermal imaging cameras, and a smaller team will remain on scene for several more hours. 

Kostiuk said the call came in just after 5:15 p.m. ET. Toronto Fire Services said that the fire was under control about an hour later.

The St. Michael’s website says the hospital has more than 5,700 staff and 467 acute adult inpatient beds. In statement released Tuesday evening, the hospital said it has begun accepting trauma and critical care patients once again.