KOLKATA: A bomb threat was reported on an IndiGo flight to Phuket, Thailand, on Saturday after a threatening message was found written on the mirror inside the aircraft’s washroom, officials said.The incident came a day after a handwritten note warning of a bomb at boarding gate number 30 was found on a tissue paper in a women’s toilet at the Netaji Subhas Chandra Bose International Airport in Kolkata.On Friday, a member of the airport’s cleaning staff found the note and alerted the authorities, prompting an extensive search of the premises.Following the discovery, the area around the boarding gate was cleared as the bomb squad, along with CISF personnel, conducted an extensive search across the airport, the official said.The latest threat on Saturday has raised fresh concerns over security at the airport.Further details awaited.