Res Gestae

And while the combat still went on with fire and sword, the tower collapsed and a way was made into the city; the defenders, scattered by the great danger, abandoned the place; the Persian hordes, raising shouts and yells, rushed from all sides and without opposition filled every part of the city; and after a very few of the defenders had been slain here and there, all the rest were taken alive by Sapor’s order and transported to the remotest parts of Persia.

This city was defended by two legions, the First Flavian and the First Parthian, as well as by a considerable number of natives, with the help of some horsemen who had hastily taken refuge there because of the sudden danger. All these (as I have said) were led off with hands bound, and none of our men could aid them.