ALLENTOWN — (AP) Authorities say an early morning house explosion on Fountain Street in Allentown blew off the front of the row home and led to a fire that spread to nine other homes, but no serious injuries were immediately reported.

Allentown fire officials said the blast was reported at 3 a.m. Sunday. One person initially unaccounted for was later found safe. One person was taken to a hospital for a minor injury and a firefighter was treated for a shoulder injury. Officials said more than two dozen people were displaced by the blaze.

Capt. John Christopher said crews were putting out hot spots but there was no longer an active fire. The cause of the blaze is under investigation. Christopher said arriving crews didn’t detect any odor of natural gas.

The American Red Cross said it provided emergency assistance for a dozen families displaced — a total of 44 people. Eight of those families were affected by the fire, and an additional four families are temporarily displaced during the demolition that is currently taking place.

Red Cross assistance helps with things like safe shelter, hot meals, clothing items and more. As of 3 p.m., all affected families had left the scene to get some rest after a long night and day.