The transients were confronting "impossible cruelty" - incorporating being fastened together with two by two, and utilizing their cell floors as latrines, the rights bunch said.
It additionally asked Saudi specialists to improve the states of the focuses.
The prisoners were removed from neighboring Yemen.
The transients from Ethiopia and different nations had been working in northern Yemen yet were constrained out by Houthi rebels, Amnesty said.
As indicated by the UN's International Organization for Migration (IOM), nearly 2,000 Ethiopians stay abandoned on the Yemeni side of the outskirt, without food, water, or medical services.
A large number of Ethiopians go to Saudi Arabia for work, making the realm country a key financial specialist and wellspring of unfamiliar settlements for Ethiopia.