Patna,(BiharTimes): Four persons, husband, wife and two sons, were taken into custody on the suspicion of giving a call to the DRM of Samastipur S P Dwevidi to threaten that the Narkatiaganj railway station would be blown up. Their interrogation is on. They have been identified as Champa Devi, Chandrika Sharma, sons Brajesh and Shashi.