GARISSA - A grenade attack killed two people in the town of Garissa in northern Kenya on Saturday and an explosive device was found close by, local residents said."We heard a blast and saw a flash light up the area. I rushed to the site and saw two people lying in a pool of blood, dead. Three others were wounded and screaming for help," Garissa resident Abdirahman Yussuf told Reuters.A short while earlier, a bomb hidden in a bag was found planted beneath a power transformer opposite a military camp, eye witnesses said. It did not detonate.