A Hunterdon County man was arrested last week after he was accused of manufacturing child pornography, authorities announced Friday. An investigation was launched by the Hunterdon County Prosecutor’s Office after it received a cyber tip from the National Center for Missing and Exploited Children, the office said in a release. Detectives from the office investigated the tip, with the assistance of officers from the Todd County Sheriff’s Office in Kentucky, the Brunswick County Sheriff’s Office in North Carolina and the New Jersey State Police. Authorities arrested Seth Maguire, 27, of Bloomsbur…