Serjeants were officers who attended the magistrates at Philippi. The term literally means “holders of rods” and corresponds to the Roman lictors. Their duty was to execute the magistrates’ orders, including punishment and release of prisoners.
In Acts, the serjeants carried the order to scourge Paul and Silas and afterward to release them. Paul and Silas refused to be dismissed privately because they were Roman citizens.
The term reflects the office of Roman lictors, officials associated with magistrates and identified by the rods they carried.