The Aam Aadmi Party government on Tuesday refused to let Delhi Police Joint Commissioner MK Meena join as the chief of the Anti-Corruption Branch (ACB), saying he cannot join on a non-existent post.

"...I am directed to inform you that there is only post of Additional Commissioner of Police in the ACB of the GNCTD (Government of the National Territory of Delhi) which is presently occupied. As there is no sanctioned post, you cannot take charge or hold a non-existent post," a letter to Meena by the Delhi government said on Tuesday.

Opening a new front in his bitter turf war with Delhi Chief Minister Arvind Kejriwal, Lieutenent Governor Najeeb Jung had on Monday created a new post to appoint the chief of the anti-graft body. "What is the conspiracy by creating a new post of joint commissioner in the ACB and appointing your favorite officers," Deputy Chief Minister Manish Sisodia tweeted on Monday.

Meena replaced SS Yadav as the new head of the anti-graft wing, with Jung also transferring seven inspectors to the department. The move came days after the Aam Aadmi Party government inducted Bihar Police officials in the ACB.

"Has the appointment been done because of the fear of CNG case being probed by the ACB?" Sisodia asked.