WILKINSBURG, Pa. - A fire alarm that blared for more than 15 hours at a Pittsburgh-area public housing complex has finally been shut off.

Residents of Glenshaw Gardens in Wilkinsburg say the alarm's strobe lights began flashing and a high-pitched screech began sounding Sunday evening when a resident burned some popcorn.

Allegheny County Housing Authority officials say the alarm was turned off Monday morning.

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Building president Bud Joyce says the delay occurred because the housing authority began managing the building in May and didn't have a key to the room where the alarm's control panel is located because the room also contains access to a bank's automatic teller machine.

Accessing the room in a way that would safeguard the ATM caused the delay. Joyce has apologized to residents and says, "It won't happen again."