Kern County Fire crews are investigating a fire at an abandoned building in Northwest Bakersfield that they say is suspicious. 

The home, located on Nord Avenue just off Hageman, initially caught fire at about 8:45 p.m. Monday. A few hours later, at around 3:30 a.m. Tuesday, it was fully engulfed. 

KCFD officials say they're investigating possible suspicious activity and say they found tire tracks in front of the home when they showed up the second time.