The woman, an alleged associate of suspended API Waze, was questioned by the NIA on Friday, sources said.
The probe agency had on Thursday searched a flat in Mira Road area that was in her possession, they said.
The NIA suspects she accompanied Waze to a citybased hotel on February 16, before the explosives-laden SUV was found near Ambani’s residence ‘Antilia’ here on February 25, the sources said. The NIA had earlier also seized eight high-end vehicles used by Waze, who was arrested in the case last month.
The NIA is also conducting a probe into the death of Thane businessman Mansukh Hiran, who was in possession of the SUV before it was found with explosives near Ambani’s house.