The Maharashtra government approached the Supreme Court on Tuesday challenging the Bombay High Court’s order directing the Central Bureau of Investigation (CBI) to carry out preliminary probe into former Mumbai Police Chief Param Bir Singh’s allegations against former Home Minister Anil Deshmukh.

A division bench of the Bombay High Court comprising chief justice Dipankar Datta and justice Girish Kulkarni on Monday ruled a CBI probe after last week’s hearing of a bunch of public interest litigations and criminal writ petitions.

On Monday, Anil Deshmukh resigned as the Home Minister of Maharashtra. Senior NCP leader Dilip Walse Patil was on Monday given the charge of Maharashtra Home department following the resignation of Anil Deshmukh.

In his resignation letter to Maharashtra CM, Anil Deshmukh said he doesn't find it morally correct to continue as the Home Minister after the Bombay High Court's order.

Terming the case as ‘extraordinary and unprecedented’, the High Court had asked the CBI to complete the probe within 15 days, after which the CBI director is at liberty to take further course of action.

Singh - an officer of the 1988-batch of the IPS – who was moved as commandant general of Home Guards, has alleged that Deshmukh had fixed a Rs-100 crore monthly ‘collection target’ from controversial police officer Sachin Vaze.

Singh was shifted from the post of Mumbai's Commissioner of Police to the Home Guards department on March 17.