The outbreak of the war found him outside Navarre, in the Cantabrian town of Suances, where he was on vacation with his family. Despite knowing the danger his profile entailed, he chose not to hide and to stay with his loved ones. Weeks later, he was arrested by militiamen from the Popular Front.
After his arrest, he refused to renounce his religious beliefs. As a consequence, he was murdered on November 13, 1936 in an episode of extreme violence: he was thrown into the sea tied up in the bay of Santander. His death is part of the episodes of repression against believers during the war.
After the conflict ended, his body was identified and transferred in 1939 to Pamplona, where he was buried in the parish of San Agustín, a place with which he had been deeply connected in life.
The canonization process advanced at the diocesan level under the supervision of the Bishop of Santander, Manuel Sánchez Monge. With the final approval of the Pope, a key instance is completed that officially recognizes the martyrdom of Arizcun and the other 79 cases included in the decree.













