As ISIS supporters celebrated online, an elderly priest was killed and another hostage was seriously wounded in Normandy, France, on Tuesday morning, after an attack on a Catholic church.

Two “bearded” men took five people hostage during morning Mass in the town of Saint-Etienne-du-Rouvray. The hostages included two nuns, two churchgoers, and Fr. Jacques Hamel, 84, who was killed.

The wounded hostage is now being treated, but is “between life and death,” according to Interior Ministry spokesman Pierre-Henry Brandet. The other three hostages have been released, and French police are now investigating the scene.

Police shot the two attackers dead.

The church was reportedly on a terrorist “hit list,” which French police may have known about since April 2015, after the arrest of an extremist in Paris last year, according to the The Sun.

French Prime Minister Manuel Valls responded to the “barbaric attack” on Twitter, saying “the whole of France and all Catholics are wounded. We will stand together.”

In the meantime, French President Francois Hollande has travelled to Saint-Etienne-du-Rouvray and is being briefed by police, BBC News reported.

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The Vatican has also issued a response to the attacks, saying it is “terrible news.” “It said the pope had been informed of the attack and shared the pain and horror in response to the ‘absurd violence,'” reported CNN.

The motive for the attack is unclear as of now. France continues to be in a state of emergency after facing multiple terror attacks over the last few months, most notably one in Nice just two weeks ago that left 84 dead.

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To read more on terror in France, click here.

(feature image via BBC/APTN)