A mysterious white substance from the bottles can be seen on the ground next to the victims

A disturbing video has emerged showing a mass suicide attempt on an underground train in China.

A group of five women and three men boarded two packed trains in Beijing before drinking from a canister.
Footage shows the men and women wincing as
they drink the mysterious liquid on Boxing Day.
Some then begin to collapse on the ground while others in the group remain standing but wincing in pain.
Panicked commuters begin to flee in horror to the other end of the carriage as members of the group begin to drop to the floor.