== Martirdom ==
Teritory of his Diocese became part of so-called Independent State of Croatia. Since he was a Serb born in Serbia, not in Bosnia, he was told to leave Banja Luka. he writed-back: "The authorities appointed me the Bishop of Banja Luka lawfully, according to canon law; having such a position I took the obligation before God, Church and people, thereat inseparably binding my life and my destiny with the life and destiny of my spiritual flock, to take care of my spiritual flock permanently and firmly, regardless of any events, and to stay on its spiritual path all the time of my life given to me by God, persevering in my staying with the flock as a good shepherd who gives his soul for his sheep…"
He asked a Roman Catholic Bishop Dr Jozo Garić(who was a Croat like Ustašas) to intervene with the authorised military officer and let him stay for two or three days more so that he could prepare for the departure. This Bishop told him to be calm and peaceful. However, the Ustaše arrested Bishop Platon the very next night (May 5, 1941) and took him, together with priest Dušan Subotić - hierarchal administrator from Bosanska Gradiska, somewhere out of Banja Luka. The two of them were killed there and their corpses were cast into the Vrbanja River. Ustasa Asim Celic committed this repulsive deed. Bishop's corpse, which was scarred and disfigured, was found in the village of Kumsale, on May 23, 1941. He had first been buried in a military graveyard in Banja Luka, and in 1973 his remains were transported to the Banja Luka Cathedral.
At the regular session of the Holy Assembly of Bishops of the Serbian Orthodox Church in 1998, Banja Luka Bishop Platon was canonized and entered into the List of Names of the Saint people of the Serbian Orthodox Church. His fast is on April 23 in julian calendar (May 5 in Gregorian)