How did Oscar Romero die?

Archbishop Oscar Romero held the see of San Salvador in El Salvador. He was assassinated on March 24th, 1980 while saying Mass when an assassin's bullet penetrated his heart. A right-wing militant group headed by former Major Roberto D'Aubuisson was implicated in the murder, having chosen the Archbishop as a target due to his denouncing of the civil war raging in the country. The Archbishop was also known for his popular work among the poor and the Civil Rights Movement. His funeral was one of the biggest, if not the biggest, in the history of Central America. He is currently up for canonization.