They met the assaults of the ram by attempts to fire the wooden covering which protected it and those who worked it.

For some days these efforts sufficed; but after a while the besiegers found a weak point in the defences of the place--a tower so recently built that the mortar in which the stones were laid was still moist, and which consequently crumbled rapidly before the blows of a strong and heavy battering-ram, and in a short time fell to the ground.

The Persians poured in through the gap, and were at once masters of the entire town, which ceased to resist after the catastrophe.

This easy victory allowed Sapor to exhibit the better side of his character; he forbade the further shedding of blood, and ordered that as many as possible of the garrisons and citizens should be taken alive.

Reviving a favorite policy of Oriental rulers from very remote times, he transported these captives to the extreme eastern parts of his empire, where they might be of the greatest service to him in defending his frontier against the Scythians and Indians.
It is not really surprising, though the historian of the war regards it as needing explanation, that no attempt was made to relieve Singara by the Romans.