A Jamestown man has been indicted by a federal grand jury for reportedly selling drugs that “caused serious bodily injury,” the U.S. Attorney’s Office said Thursday.

Bradley D. Knapp, 43, was indicted on charges of narcotics conspiracy, using and maintaining a drug-involved premises and distribution of controlled substances causing serious bodily injury.

According to the U.S. Attorney’s Office, Knapp allegedly conspired with others to sell heroin, methamphetamine and fentanyl; the city man reportedly sold controlled substances “that caused serious bodily injury to an individual,” though details weren’t specified in a news release.

Knapp reportedly used a Ninth Street residence in the city for drug trafficking activities, the agency said.

He was arraigned before U.S. Magistrate Judge Jeremiah McCarthy and detained. The charges carry a mandatory minimum penalty of 20 years in prison.

The case was brought by the U.S. Attorney’s Office as part of its Project Safe Neighborhoods initiative.