The Wagon tragedy was the death of a large number of prisoners on 20 November 1921 in the Malabar region of Kerala state of India. The prisoners had been taken into custody following the mappila rebellion against British Colonial rule and their deaths through apparent negligence discredited the British Raj and generated sympathy for theIndian independence movement.

Initially inspired by Mahatma Gandhi and the national leaders of India, the Khilaphat movement later turned in to a religious rebellion against Hindus and there was a widespread and violent uprising against the British colonial rule of India in which hundreds of Hindus got killed and thousands forcefully converted to Islam. After a series of events that culminated in violent clashes between police and protesters, Martial law was introduced and the rebellion mostly crushed. The British packed 70 prisoners into a railway goods wagon at Tirur railway station to be sent to the pothannurCoimbatore district jails. By the time they reached their destination 61 of the prisoners had died from suffocation. A monument to this notorious tragedy can be now seen at Tirur.

http://en.wikipedia.org/wiki/Wagon_tragedy

http://en.wikipedia.org/wiki/Jallianwala_Bagh_massacre