CONCORD, Mass. (AP) — A Massachusetts teen's chemistry experiment has left two firefighters and a resident hospitalized.

The Concord Fire Department responded to a report Tuesday night of smoke coming from a structure. They extinguished an "unusual" substance being cooked on the stove.

The state police bomb squad and the Massachusetts Fire Marshal's Office also responded.

The Lowell Sun reports a preliminary investigation determined the teenager residing in the home was attempting to create a colorful smoke bomb based on a video he found online.

There was no clarification on what the substance was. Officials said the hospitalization of the firefighters and resident were for precautionary reasons.

Technicians were sent into the house to determine the air quality and an investigation is ongoing.

Police did not rule out criminal charges.

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