Fire crews were scrambling Monday night when a fire broke out at the Cory potash mine southwest of Saskatoon.
It happened at the cogeneration power station next to the mine at around 7 p.m. CST.
Fire crews from Potash Corporation fought the blaze and called in Saskatoon fire crews to help. The fire was out before 8 p.m., officials said.
No one was hurt, but one group of miners had been coming up the shaft at the time of the fire. The next shift was delayed by about 90 minutes for a safety check.
It was a transformer that caught on fire, Potash Corp. spokesman Bill Johnson said.
"At this point, we don't know what the cause was, but obviously we'll do a full investigation and find out what went on," he said.
"Thankfully, no one was hurt and it appears it's going to have relatively minimal impacts on the operations at this stage."
The company will do a full assessment of the damage, Johnson said.