According to District Magistrate G S Priyadarshi, Khalil, Bhura and Inam Qureshi were booked under NSA on the recommendation of the local police last evening.
They were arrested on June 24 for allegedly slaughtering cows in Katka village under Jansath police station in the district and one quintal of beef was seized from their possession, he said.
The accused have been in jail since then, added Circle Officer S K S Pratap.
State Director General of Police (DGP) Sulkhan Singh had issued a directive in June to all district police chiefs to book those involved in cow slaughter and illegal transport of milch animals for slaughter under the stringent NSA and Gangsters Act in Uttar Pradesh.