SANTA FE, N.M. (AP) — The FBI on Friday arrested five former residents of a ramshackle compound in New Mexico on firearms and conspiracy charges as local prosecutors dropped charges in the death of a 3-year-old boy at the property.

Taos County District Attorney Donald Gallegos said his office will now seek grand jury indictments involving the death.

He said seeking indictments will allow more time to gather and analyze evidence, and enable his office to avoid calling juveniles from the compound as witnesses in court.

Three of the adults from the compound had been released Wednesday after state...