Bhubaneswar January 8 : Odisha Chief Minister Naveen Patnaik has received an anonymous letter claiming that a conspiracy has been hatched to kill him. Official sources gave this information on Thursday. He said that after receiving this threatening letter, the state government has ordered an inquiry into the subject. This letter came to the address of Patnaik’s residence and it is written in English. The letter also states that the mastermind of the conspiracy lives in Nagpur (Maharashtra).After this, Special Secretary (Home) Dr. Santosh Bala has ordered the top police officers of the state to investigate the subject. Bala also said that security has been increased during the Chief Minister’s residence, secretariat and his visit.