CNN — A Texas community is mourning the loss of two firefighters.

Lieutenants Eric Wallace and Greg Pickard were killed fighting a fire that broke out Friday at this local Knights of Columbus Hall.

A passerby called 9-1-1 to report the fire.

Officials say the hall was empty at the time the fire started.

Wallace died after being trapped inside the building and Pickard was burned trying to get him out.

He died Saturday at a hospital.

A cause of the fire hasn't been determined.