'Prisoners' in the Bible

About midnight Paul and Silas were praying and singing hymns to God, and the prisoners were listening to them,

Starting up from sleep and seeing the doors of the jail wide open, the jailer drew his sword and was on the point of killing himself, supposing that the prisoners had escaped.

Now when it was decided that we should sail for Italy, they handed over Paul and a few other prisoners into the custody of Julius, a Captain of the Augustan battalion;

Now the soldiers recommended that the prisoners should be killed, for fear some one of them might swim ashore and effect his escape.