At 4:33 p.m. Saturday, Dec. 22, Round Rock Fire Department units responded to a report of a residential structure fire at 1633 Sylvia Court.

The first Fire Department units arrived at 4:39 p.m. Firefighters saw flames in the back yard of the residence. When crews went to locate the source they found the back of the house was engulfed in fire.

There were no injuries. One dog was rescued from the home.

The fire was contained and extinguished at approximately 5:29 p.m. The last Fire Department units cleared the scene at 7:25 p.m.

The cause of the fire is under investigation.