Atish Kumar Mishra, Hanuman Shukla and Rahul Upadhyay were arrested from Kapoorthala locality in Aliganj yesterday on a tip off, an official release issued by the STF said.
During interrogation, the trio told the STF that they had taken a sim card after submitting a fake identity proof and registered it in a caller identification app as 'Chief Minister UP'. They used it to call builders and others.
Posing as personal assistant of the CM, the accused called Deputy Labour Commissioner, Kanpur, RK Mishra and directed him to conduct a raid on a firm. Mishra, however, became suspicious and informed the district magistrate of Kanpur about it.
Further probe is on, the release said.