According to the BBC, the priest, Fr. Claude Grou, the rector of the Saint Joseph’s Oratory, was taken to the hospital and is said to be in a stable condition.
The incident happened on Friday in Montreal.
Police authorities responded to call around 8:40 a.m. and witnesses said a man went towards the priest with a sharp object during the daily mass where 50 people were in attendance.
The attack was captured on a livestream and television broadcast by the Catholic channel Salt + Light, which publishes the streams shortly after the mass.
“When police arrived, the suspect was already detained by church security and the priest was slightly injured on his upper body,” Montreal police spokesperson, Caroline Chèvrefils, said.
“The suspect was then taken into custody, transported to a detention center and will be interviewed by investigators,” she added.