Seattle Fire investigators have determined that Wednesday’s late-night fire under the south end of the Ballard Bridge was caused by a transient cooking fire.

Firefighters were called out just before 11:30 p.m. after a report of smoke coming from underneath the bridge. When crews arrived on scene, they found a fire underneath the bridge in a storage yard. Four small boats, a truck and wooden pallets were destroyed before the fire was extinguished about 20 minutes later. Because of the location of the fire, the bridge sustained soot and fire damage. According to Seattle Fire, Seattle Department of Transportation inspectors have inspected the integrity of the structure.

Investigators have ruled the fire as accidental and damage is estimated at $100,000.

Last night Major fire burns under Ballard Bridge