Lamjung, May 14 An unidentified group exploded a bomb at a place near Baguwa Devithan of Rainash Municipality, Lamjung on Saturday night. Locals said that the group had detonated the bomb at around 9:08pm. Police suspect that Netra Bikram Chand-led CPN-Maoist cadres might have detonated the improvised explosive device. An investigation into the case is under way, police said.