On May 3, 2015 four farmers were walking towards Matuguinao proper when they were indiscriminately fired at by three armed men. Vicente Sorio and Alfredo Diaz were hit while their companions were able to drop down to the ground and escaped the bullets. After the shooting, the farmers who survived ran to get help from local government officials. They brought Alfredo and Vicente to the hospital in the hope of saving them but Vicente Sorio was pronounced dead. Alfredo on the other hand was able to tell who their shooters were before he also died after about 20 minutes. The identified killers were three paramilitaries from the 87th Infantry Battalion of the Philippine Army based in Matuguinao, Samar.

The families of Alfredo and Vicente filed cases in court against the three perpetrators but up to this date, there were no investigations made by authorities.

Alfredo Diaz and Vicente Sorio were members of Matuguinao Small Farmers Association and ANAKPAWIS (a pro-labor and pro- peasant partylist).