"We demand that police officials who are responsible for the poor condition of Dum Dum jail inmate Bikram Mahato be punished," Committee for Protection of Democratic Rights Secularism (CPDRS) general secretary Chhoton Das said.
He said the human rights bodies will also write to state Jail Minister Shankar Chakraborty demanding that the human right groups be allowed to meet the suffering jail inmates.
Mahato, he claimed, was not the first case of prison brutality. In 2010, another prisoner Farhat Mehmood was stripped and beaten up in Presidency Central correctional home in the city.
West Bengal Human Rights Commission had asked Inspector General of Prisons to inquire into the incident of naked photograph of a prisoner of Dum Dum Central Jail published in an English daily, which alleged that he was stripped, beaten and handcuffed.
Besides CPDRS, Peoples Union for Civil Liberties, Bandi Mukti Committee, Banglar Manabadhikar Suraksha Mancha and Minorities Rights Ward held demonstration in the city during the day.