Northwestern PA Paper Mill Still Running After Tunnel Fire

A northwestern Pennsylvania paper mill is still in business even as state police investigate the cause of a fire in a conveyor tunnel used to deliver wood chips to the plant.

The fire was reported Friday about 12:30 p.m. at the Domtar Paper site in Johnsonburg, about 100 miles northeast of Pittsburgh. Nearly 200 firefighters from 25 departments in six counties helped battle the blaze until about 11 a.m. Saturday.

Police say extensive damage to the tunnel might delay that investigation several days.