The condition of lifer Pravin Mahajan, who suffered brain haemorrhage, has shown no significant improvement, a hospital spokesman said on Sunday.
Pravin (50), who is currently serving life term for murdering his brother and BJP leader Pramod Mahajan, is still critical.
"He is unconscious and is on life support system," the spokesman of Jupiter Hospital in Thane, said.
Doctors in the hospital had on Saturday stated that the cause of haemorrhage could be hypertension and it was not possible to predict the prognosis at this stage.
Pravin was released on a fortnight's parole late last month.
He was admitted to Jupiter Hospital on the night of December 11 after he complained of fatigue and severe headache.