FORWARD OPERATING BASE ISKANDARIYAH, Iraq -- Marines from the 24th Marine Expeditionary Unit discovered two 160 mm mortar tubes and ammunition while patrolling outside Forward Operating Base Iskandariyah, Iraq, Sept. 26.During the patrol, the Marines from Bravo Company, Battalion Landing Team 1st Battalion, 2nd Marines, discovered a weapons cache behind mounds of dirt in a field adjacent to the road.The 24th MEU is currently conducting security and stability operations in Northern Babil Province.