 The unit regrouped and discovered that PFC Acosta-Rosario and another machine gunner, PFC Philip T. DeLorenzo, Jr., were missing.Acosta-Rosario's platoon sergeant stated that he believed PFC Acosta-Rosario had been hit by enemy fire prior to the unit's withdrawal.The NVA forces were driven back after artillery fire and helicopter gunships were called in and Company B returned to its original position.