During questioning, it emerged they were associated with an in-vitro fertilisation (IVF) centre registered in Thane. The police were searching for a third woman, reportedly an agent.The immigration officials first stopped Sunoti Belel (44) around 1.30pm on Friday. Officials questioned both and learned that Vinzarat accompanied Belel to Bangkok for advanced diagnostic tests needed before an egg donation and was paid a "big sum". "She did not give satisfactory answers," he said, referring her to the wing in-charge for further questioning. "She too failed to give a satisfactory answer," he added.Further questioning revealed Belel took Vinzarat to Bangkok for tests before egg donation.