The CPI in Telangana staged aprotest here on Thursday demanding the resignation of Union Home Minister Amit Shah for his alleged failure in handling the violence in Delhi.Senior CPI leader K Narayana, CPI Telangana state secretary Chada Venkat Reddy were among the 25 party cadres taken into preventive custody for holding a protest, police said adding they were released later.Shah should resign taking moral responsibility for the violence in Delhi, the CPI leaders said.