Senior Trinamool Congress leader and MP Sougata Roy claimed he received a phone call in which the caller threatened to kill him if arrested party leader Jayant Singh was not released soon. Singh, a TMC leader from the Ariadaha area in West Bengal’s North 24 Parganas district, is a prime suspect in a mob violence incident that occurred on June 30 and was arrested by the police last week. Ariadaha comes under the Dum Dum Lok Sabha constituency which Roy represents as a four-term MP.