According to a complaint filed by the manager of Agrasen Bhavan, the letter was found on January 1 at the gate and it threatened bombing at gate number 1 and 2, between February 6-10, as it is rented out to 'kafirs' (non-Muslims), Incharge, Railway Road police station Hansraj Bhadoria said.
A compaint has been registered in this connection today, police said.
Prima facie going by the language of the letter, the letter appears to be a hoax, but the police have nevertheless taken the matter seriously and are investigations are on, they said.