Police in Somerset County arrested a 21-year-old man with nearly $30,000 worth of illicit street drugs and prescription pills at a home in Pittsfield early Thursday morning, the sheriff’s office said. Sheriff’s detectives, Pittsfield police, and officers from the State off of Probation and Parole seized heroin, fentanyl, cocaine and oxycodone pills with a street value of $29,000 when they executed a search warrant at the Nichols Street home around 5:50 a.m., Sheriff Dale Lancaster said.