Two men armed with knives took two nuns, a 92 year-old priest, and two worshipers hostage in a church in Saint-Etienne-du-Rouvray, in northern France.
Several witnesses report they yelled "Daesh" - Arabic for "ISIS" - as they ran into the church, reports Le Pointe.
The men slit the throat of the priest, before they were killed by security forces. Another hostage is fighting for his life.
The President of France is on his way to the site.