Ludhaina, Punjab (December 16, 2013): It is learnt from sources that the Sikh youth, Gurpreet Singh alias Guri of Kila Hans village of Ludhiana district, who used so-called World Kabbadi Cup’s stage on December 14, 2013 at Guru Nanak Stadium Ludhiana to raise the voice of Sikh political prisoners languishing in Indian jails despite serving the terms of their sentences, has been sent to Central Jail, Ludhiana.