Mumbai: Racing against time, Mumbai police is toiling round-the-clock to gather more evidence and crack the motive behind Sheena Bora's murder as the three main accused are due to be produced before a court here to seek an extension of their remand on Monday.

The accused trio -- Indrani Mukherjea, her ex-husband Sanjeev Khanna and her former driver Shyamvar Rai -- were sent to police custody on Saturday till September 7.