According to report, the Priest was holding the holy ceremony at the altar when the extremist rushed towards him with a backpack bomb and tried to blow himself up.
The bomb burned without setting off the explosives, so the jihadi pulled an axe from his bag and slashed the priest's arm at St Yoseph Church in Medan, the capital of North Sumatra in Indonesia.
The congregation then stepped in and managed to wrestle the axe from his grasp, detaining him until the police arrived.
Police report found out that the Knife man was a muslim and his ID card and a hand-drawn picture of the ISIS flag.
The young fanatic also told police that he was not working alone.
By Esther Okafor