What saint was martyred holding the Eucharist?

St. Tarcisius, a 3rd - 4th century deacon, was attacked by a pagan mob, and died defending the Hosts he was taking to Chrisitan prisoners. It is said that when the pagans searched him after beating him to death, the Hosts had miraculously disappeared.

While not yet a canonized saint, Archbishop Oscar Romero was murdered in El Salvador duirng the consecration of a Mass he was saying. As he held up the chalice and pronounced the Words, "This is the cup of my blood . . ." the shots rang out and his blood mingle with that of Christ on the altar.