VATICAN CITY (RNS) – Pope Francis raised the specter of a World War III “in pieces,” Muslims issued statements of condemnation, and evangelical Christians in America debated whether to speak of a “war with Islam.”

These were some of the responses by religious leaders around the world on Saturday, Nov. 14, to the series of attacks overnight in Paris which left more than 120 people dead.

Related: ISIS: Faith without Reason

“This is not human,” Francis said in a phone call to an Italian Catholic television station. Asked by the interviewer if it was part of a “Third World War in pieces,” he responded: “This is a piece. There is no justification for such things.”

Earlier, the Vatican’s chief spokesman, Rev. Federico Lombardi, released a statement saying: “This is an attack on peace for all humanity, and it requires a decisive, supportive response on the part of all of us as we counter the spread the homicidal hatred in all of its forms.”

In Cairo, Al-Azhar University, the preeminent seat of Sunni Muslim scholarship, called the attacks a criminal act, and said that “Islam denounces any violence,” the Arabic news site Al Arabiya reported, quoting Egypt’s state news agency MENA.

“This is an attack on peace for all humanity, and it requires a decisive, supportive response on the part of all of us as we counter the spread the homicidal hatred in all of its forms.”

On Saturday morning, French President Francois Hollande said the attacks were an “act of war” carried out by the group that calls itself The Islamic State. Its propaganda arm took responsibility in statements in various languages, claiming revenge for French participation in U.S.-led military operations against its fighters in Syria and Iraq.

Witnesses had reported hearing the cry “Allahu Akbar” from gunmen, and supporters of the group cheered on social media while many other Muslims condemned the bloodshed.

Related: Stop ISIS: Borders, Guns and God

In Ireland, the imam of the Al-Mustafa Islamic Centre in Dublin said his thoughts and prayers are with the people of Paris “and every other place on earth plagued by sick men with weapons and bombs.

Who do you think would win the Presidency?

By completing the poll, you agree to receive emails from LifeZette, occasional offers from our partners and that you've read and agree to our privacy policy and legal statement.

“Terrorists have no religion whatsoever,” said the Muslim leader, Umar Al-Qadri. “Their religion is intolerance hatred for peace.”

Shuja Shafi, secretary general of the Muslim Council of Britain, said: “This attack is being claimed by the group calling themselves ‘Islamic State.’ There is nothing Islamic about such people and their actions are evil, and outside the boundaries set by our faith.”

“Terrorists have no religion whatsoever.”

In the United States, the reactions varied, including among evangelical Christians.

Franklin Graham, son of the preacher Billy Graham, said: “Islam is at war with us.”

“As we pray for France we also need to pray for wisdom for the world’s leaders & that Islam will be stopped in its tracks,” he tweeted.

However, evangelical author Ed Stetzer criticized the call for “war with Islam.”

“I want to see Muslims come to Christ (as, yes, they want to win me to Islam). And, we can’t do that by going to war with a billion people,” he wrote in Christianity Today.

Related: Logic Won’t Work on ISIS Recruits

Among mainline Protestants, the Presiding Bishop of the Episcopal Church, Michael Curry, called upon “all Episcopalians and people of good will and faith to pray for those who have died.”

Iran’s president Hassan Rouhani cancelled a meeting with the pope at the Holy See, as well as the rest of his European trip which included a visit to Paris.

Rouhani had been due to arrive in Rome on Saturday for meetings with the pontiff and the Italian prime minister, Matteo Renzi.

The Iranian leader called the attacks “crimes against humanity.”

Multiple terrorist attacks in the French capital targeted civilians at a concert hall, restaurants and a sports stadium where President Francois Hollande was present. At least eight attackers also died, seven reportedly blowing themselves up while one was shot by police.

This article originally appeared in Religion News Service.