The young men, all university graduates, were promised a job in the army with a salary of $1,844 per year, The Express Tribune said.
But the army took the men hostage and tortured them, one of the deportees said.
The men were not given food and did not have access to toilets for five days, The Express Tribune reported.
Bahrain is expected to deport 100 more Pakistanis Friday.
The young men have urged the United Nations to take notice of the incident, The Express Tribune said.