GREEN BAY, WI (WTAQ) - The future of Al's Hamburger Shop in downtown Green Bay is unknown following a fire there Saturday afternoon.
Officials say the building at 131 South Washington Street was fully engulfed when they arrived on scene around 5 p.m.
Fire officials say a bicyclists passing by called 911 to report the fire, but the shop was not believed to be open at the time of the blaze.
The fire appears to have started in the back of the building and moved forward causing extensive damage to the structure, according to the firefighters on the scene.
Fire crews were able to stop the fire from spreading to adjacent buildings. The cause of the fire remains under investigation.