— | Photo Credit : PHOTO : PTI Sushanta Talukdar Police suspect that it is the handiwork of ULFA ULFA desperate to show its strength after arrests , say police Caller tells TV channels that ULFA is not involved in the blasts Guwahati : Seven people were killed and 55 , including minor children , injured in two bicycle-bomb blasts in Nalbari , headquarters town of lower Assam ’ s Nalbari district on Sunday morning .