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PORTLAND -- Portland firefighters trying to help a man suffering from a possible drug overdose had to call police for help after the patient became violent.

Police say the thrashing 19-year-old bit a firefighter in the leg Wednesday night. Then, a 36-year-old man at the residence locked the door and wouldn't let firefighters leave for a short time.

Officers arrived and arrested the 36-year-old for interfering.

The 19-year-old was treated at a hospital for the possible overdose and alcohol poisoning.

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