JACKSONVILLE, Fla. -- No one was hurt this morning in a house fire in the 4600 block of Cardinal Boulevard.

Jacksonville Fire and Rescue Department responded to the house fire around 4 a.m.

The people who live in the house went out and when they came back, the house was on fire.

Firefighters were able to keep most of the blaze to the master bedroom. Investigators aren't certain what exactly started the fire.