A Sunday fire that destroyed a four-unit apartment building was discovered by an upstairs resident who awakened the only other person in the building, allowing both to escape unharmed, a spokesman for the St. George Fire Department said.

The blaze at 15025 Shenandoah View Court, which is near the intersection of Jones Creek and Tiger Bend roads, started about 5:20 a.m., spokesman Eldon Ledoux said in a news release.

When a man in an upstairs unit was awakened by his smoke alarm, he saw flames in and above his apartment, says Ledoux’s release. The man woke the woman who lived directly below him and they left the building.

One of the other units was vacant, and the resident of the other apartment was not home, the release says.

The glow from the fire could be seen from several blocks away, the release says.

That building was a total loss, Ledoux’s release says, but the firefighters kept the blaze from spreading to a four-unit building next door.

Investigators are working to find the cause of the fire, the release says.