Thane: A threat phone call made to a Thane call centre of the national carrier Air India last week, in which an anonymous person allegedly threatened to hijack one of the carrier's flight on November 28, has been traced to Madhya Pradesh.

Preliminary investigation, following an FIR lodged by the state-owned airline, reveals that the said call was received from Madhya Pradesh, Thane Police PRO Gajanan Kabdule today said, without divulging any further details.