Crews were called to quadriplex in the 2200 block of 35th St around 3:45 p.m.
When they arrived, flames were shooting out of the building and thick, black smoke was billowing in the air.
Initially, dispatchers were told a child may have been trapped in the apartment. Crews later discovered everyone made it out of the unit unharmed.
Crews remained on scene well after the fire was put out, monitoring the charred shell of the apartment and working to contain smoke damage with fans.
Stay with EverythingLubbock.com and KAMC News for more on this story.