Authorities continue to investigate the cause of a fire early Thursday morning in Donora that destroyed an apartment building in Donora. Officials say the blaze broke out around three o’clock in the 700 block of McKean Avenue, causing a partial collapse of the building. There were no injuries, but crews had to spread a large supply of salt across the road to prevent it from icing over because of the bitterly cold temperatures. Demolition crews were brought in after the fire gutted the three-story building, and they spent part of the morning chipping away at what was left, with demolition efforts expected to continue throughout the day. (Photo: WPXI)