Yamunanagar  : GRP Haryana has started a special checking campaigns at the railway stations in Haryana after receipt of a threatening letter by registered post by the station master S.K. Joshi of Yamunanagar-Jagadhari railway station as well as by the station master Ambala threatening to blast several railway stations Jagadhari-Yamunanaga, Ambala Cantt, Panipat, Karnal, Sonipat, , Chandigarh, Kalka and few other religious places in Haryana state before coming this Diwali festival. GRP SHO Vilayati Saini said that the letter further stated that on this Diwali people in the state will celebrate festival with blood instead of candles. He said that a special checking campaign has been launched and alert declared in the area.