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Mumbai,  Aug 7: Unless Maharashtra Government consents to CBI investigation in the Sushant Singh Rajput's death case, it would be illegal, affecting the federal structure of the country, said actor Rhea Chakraborty's lawyer.

The Central Bureau of Investigation (CBI) has registered and continued the illegality which was perpetrated at the hands of Bihar Police in connection with the case, he added.

"The Bihar Government transferred a case with which it had no jurisdiction to investigate, to CBI instead of the Mumbai Police which is the legal position. The Supreme Court is seized of the issue pursuant to the transfer petition filed by Rhea Chakraborty," said Satish Maneshinde Chakraborty's lawyer.

The Supreme Court has directed all parties to file their replies and Mumbai Police is directed to place the report of investigations, he added.

"Pending the said proceedings the CBI has registered and continued the illegality which was perpetrated at the hands of Bihar Police.

CBI being a premier investigative agency in the country should desist from taking any further steps pending the SC proceedings. Apart from the same unless the Maharashtra Government consents to CBI investigating the case ... it would be totally illegal and beyond any known legal principles, affecting the Federal Structure of the Nation," said Maneshinde.

The Special Investigation Team (SIT) of the CBI that is probing high profile cases of Vijay Mallya and AgustaWestland cases will now investigate the Sushant Singh Rajput's death case.

The investigating agency has registered a case against six accused including Bollywood actor Rhea Chakraborty and others in connection with the Rajput's death.

The sources in CBI said that six accused in the case will be summoned soon for questioning and other persons will also be called for examining which was earlier examined by Mumbai police.

Bihar Chief Minister Nitish Kumar had earlier sent a recommendation to the Central Government for CBI investigation in the case filed in Patna based on the complaint of Sushant's father KK Singh against Rhea Chakraborty under sections including abetment of suicide on July 25.

Sushant was found dead at his Mumbai residence on June 14.

Days after Rajput's death, Rhea Chakraborty said she was the "girlfriend" of the 'Dil Bechara' actor while requesting a CBI inquiry in the case.

Chakraborty has also approached the Supreme Court for transfer of investigation to Mumbai in the FIR registered against her in Patna.

Mumbai, Aug 1: Maharashtra Chief Minister Uddhav Thackeray has said that Sushant Singh Rajput case should not be politicised or used to create friction between Maharashtra and Bihar.

Amid the ongoing criticism faced by the Mumbai Police following an investigation into Rajput's death case, the Chief Minister stressed that Mumbai Police is not "inefficient" while appealing those who have any evidence in regard to the case to step forward.

"Mumbai Police is not inefficient. If anyone has any evidence they can bring it to us and we will interrogate and punish the guilty. Please do not use this case (Sushant Singh Rajput death case) as an excuse to create friction between Maharashtra and Bihar," Thackeray said on Friday.

"Bringing politics in the case is the most deplorable thing to do," he added.

Maharashtra government has filed a caveat before the Supreme Court in the Rajput's death case.

Earlier, Bihar government and Rajput's family have filed caveats in the top court seeking to challenge actor Rhea Chakraborty's petition that sought transfer of the FIR registered in Patna to Mumbai in the actor's death case.

"After Bihar government and Rajput's family filed a caveat in the Supreme Court, Maharashtra government has filed a caveat before the SC today to ensure that no order is passed in Rhea Chakraborty's petition case without hearing its (Maharashtra) side," said Sachin Patil, standing counsel for Maharashtra Government.

A caveat is a legal process, in which the party which had filed it before the concerned court, shall have to be heard definitely before the concerned court passes any order in future.

Bihar Police has sought the assistance of Mumbai police to probe the Sushant Singh Rajput case, Mumbai police Crime Branch officials told ANI. However, the Police are still considering their request.

Bihar Police team reached after an FIR was filed by late actor's father KK Singh against Chakraborty in Bihar under several sections including abetment of suicide.

Rajput was found dead in his Mumbai residence on June 14.