By Al Novack

NORRISTOWN, Pa. (CBS) – Authorities say six people were sickened by suspected carbon monoxide fumes early Monday morning in Norristown, Montgomery County.

The incident happened around 3 a.m. inside a home on the 400-block of West Marshall Street.

All six people were taken to the hospital. They are all said to be in stable condition.

The source of the fumes remains under investigation but they are believed to be from a defective heater.

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