Officials in the investigating team, speaking on condition of anonymity, said that Indrani and Khanna had called Mikhail to Mumbai in the last week of April in 2012 and kept him at a hotel at Worli.

They said that Mukherjea and Khanna had called him to Mumbai for settling some family issues and served him some soft drinks in a hotel which was laced with sleeping medicines.

Leaving him at the hotel, Mukherjea, Khanna and driver Shyam Rai allegedly murdered Sheena on April 24, the officials said, adding that when the trio returned, Mikhail had fled.     

Mikhail said he had regained consciousness and fled the hotel and left Mumbai for Guwahati.

Mumbai Police will produce Indrani and Khanna in court today seeking extension of their custody. Police will seek further remand of the duo to probe the fresh charge of attempt to murder against them.

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