Exactly a month after an SUV Scorpio was found parked outside Antilia, the home of industrialist Mukesh Ambani, the National Investigation Agency is now tracking a 'mystery woman' accompanying the prime accused Sachin Waze to a five-star hotel in south Mumbai.

Waze, currently in NIA custody till Thursday, was seen entering the hotel where he spent at least five days in mid-February using some fake identity papers and the woman close behind him was noticed, baffling the investigators, official sources said.