(CBS) – Chicago firefighters were involved in an unusual rescue Friday afternoon.

READ MORE: Red Cross Day Of Giving: Here's How You Can Help!

Crews rescued a 3-year-old, 95-pound pit bull named Theo after the dog fell into a sewer while walking with its owner, Chicago Fire Department Spokesman Larry Langford tells WBBM.

READ MORE: Red Cross Honors 16-Year-Old Hero Blair Holt, Who Lost His Life While Shielding Classmate From Gunfire

The dog’s owner approached the firehouse at 25 S. Laflin St. and explained that his dog fell into the sewer across the street from the station.

Fire crews descended into the sewer with rescue equipment and  found the dog frightened but uninjured. The rescue took about 20 minutes before the dog emerged above street level.

MORE NEWS: Jussie Smollett Trial: Prosecution Starts Its Case, Calls First Witness In Disorderly Conduct Trial

The canine was reunited with its owner after a thorough cleaning.