HAVERHILL — A hazmat crew from the state Fire Marshal's office was sent to Webster Street late Monday afternoon to assist first responders with the cleanup of an "unknown white powder" found in an apartment, Fire Chief William Laliberty said.

The District 6 Hazardous Materials Team was activated after an overdose at 16 Webster St., Laliberty said. 

Trinity EMS paramedics transported the patients to a local hospital for treatment. Their condition is unknown.

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