By Our Reporter Five powerful grenade explosions -- three in Dibrugarh and one in Charaideo districts -- rocked Assam on Sunday morning, when India was celebrating Republic Day, reported the Indian media on Monday. In Dibrugarh district, an explosion took place at Graham Bazaar and another beside a gurudwara on A T Road, both under Dibrugarh police station, said police. Another blast was reported in front of a shop at Tiyakghat Tiniali area near Sonari in Assam’s Charaideo district at around 8 am. Top police officials and other security personnel rushed to the spot and collected splinter. Locals said that bike-borne suspected militants had lobbed a grenade and fled from the area. Another explosion rocked the oil town of Duliajan in Dibrugarh whose details are still awaited, police said. Another blast was reported in Tinsukia district, the details of the explosion are awaited. "We rushed to the spot when we heard the sound of the explosion. Some people said that bike-borne miscreants had lobbed a grenade and fled from the area," said a local villager. Assma Chief Minister Sarbananda Sonowal condemned the blasts by saying, "The cowardly attempt to create terror on a sacred day only exhibits the frustration of the terror groups."