Upper Darby, PA – Three people were hospitalized after a carbon monoxide leak inside an Upper Darby home.
The incident occurred around 2 p.m. Sunday on the unit block of Richfield Road.
Officials say a water heater malfunctioned inside the home.
Police were notified after a disoriented person walked outside, asked for help and collapsed.
Upon arrival, they found two more people inside the home.
They were all taken to a local hospital for treatment.
The investigation is ongoing.