Authorities in Somerset County are trying to find three men who committed an armed home invasion this past weekend in Franklin Township. The masked gunmen forced their way into a home on Cedar Grove Lane through a garage entrance just after 12:30 a.m. Saturday and demanded money from the owner, the Somerset County Prosecutor’s Office said Tuesday. The robbers then fled with the cash, authorities said. The homeowner was treated for minor injuries. A spokesman for the prosecutor’s office confirmed other family members were home during the robbery. He declined to answer additional questions about…