They said Amir was seen taking pictures of the minister, who left for New Delhi on Tuesday, using his camera. Amir had confirmed first-class tickets to Delhi and from there to Dubai.
An initial probe revealed that Amir was one among two persons detained last month by Central Industrial Security Force personnel for reportedly giving contradicting replies at the airport.
Earlier, Amir, along with Mansoor, hailing from Kerala, was detained after they wanted to get off the Dreamliner aircraft ahead of its flight to Delhi. The duo reportedly gave contradictory replies when the CISF sought an explanation for cancelling their journey at the last minute.
An inquiry is underway as to why he opted for a long trip to Dubai when there are direct flights available from Thiruvananthapuram and Kochi respectively to Dubai, they said.