OKMULGEE, Okla. (AP) -- The Oklahoma Highway Patrol says a portable methamphetamine lab exploded in a man's pants as he tried to run away from a state trooper during a traffic stop.

Tulsa television station KOTV reports the incident happened in Okmulgee County. Authorities say the man tried to run away when the trooper asked him about a chemical smell.

Trooper Shiloh Hall says the man had an active meth lab in his pants that burst during a struggle with the trooper. The man was checked out by emergency personnel and booked in the Okmulgee County jail on a drug charge.

A portable meth lab is also known as a one-pot lab, where a smaller batch of the drug is manufactured.

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