As many as 22 labourers were found unconscious at a warehouse of a factory near Tower in the early hours of Monday in Karachi
The police and rescue workers shifted them to Civil hospital.
The labourers reportedly fainted because of the consumption of an "unhealthy" beverage given to them by a fellow worker.
A labourer had spiked the drinks of his co-workers last night and looted all their belongings — mobile phones and money — after they fainted, the police explained.
One labourer, identified as Allah Rakha, has been taken into custody for interrogation.
