Flames broke out along the 500 block of Market Street in Williamsport just before 9 a.m.
The building has a dry cleaning business on the first floor and apartments above it.
Photos by 7’s Photography show flames and heavy black smoke coming from the upper floors.
A total of five fire departments within Lycoming County responded to knock down the fire in the city.
Two adults and four children all made it out of the apartment safely. They were taken to the hospital to get checked out. Fire officials were not sure what the extent of their injuries were.
The Red Cross is assisting the family.
Coder’s Dry Cleaning & Laundry, the first-floor business, was not open at the time.
The cause of that fire is under investigation in Williamsport.
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