Muslims took a stand against the recent barbaric attacks carried out in the name of Islam by showing up to Sunday Mass in churches and cathedrals in France and Italy.

A few dozen Muslims gathered at the towering Gothic cathedral in Rouen, near Saint-Etienne-du-Rouvray where the 85-year-old Rev Jacques Hamel had his throat slit by two teenage Islamic extremists on Tuesday.

'We are very moved by the presence of our Muslim friends and I believe it is a courageous act that they did by coming to us,' Dominique Lebrun, the archbishop of Rouen, said after the service.

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Muslims took a stand against the recent barbaric attacks carried out in the name of Islam by showing up to Sunday Mass in churches and cathedrals in France and Italy. Pictured here are members of the congregation in the Santa Maria Caravaggio church in Milan

Some of the Muslims sat in the front row, across from the altar where Adel Kermiche and Abdelmalik Petitjean, both 19, filmed themselves performing an Islamic sermon before slitting the elderly priest's throat.

Among the parishioners was one of the nuns who was briefly taken hostage at Hamel's church when he was killed.

She joined her fellow Catholics in turning to shake hands or embrace the Muslim churchgoers after the service.

Outside the church, a group of Muslims were applauded when they unfurled a banner: 'Love for all. Hate for none.'

Churchgoer Jacqueline Prevot said the attendance of Muslims was 'a magnificent gesture.'

'Look at this whole Muslim community that attended Mass,' she said. 'I find this very heartwarming. I am confident. I say to myself that this assassination won't be lost, that it will maybe relaunch us better than politics can do. Maybe we will react in a better way.'

Many of the Muslims who attended the service in Rouen - including those with the banner - were Ahmadiyya Muslims, a minority sect that differs from mainstream Islam in that it doesn't regard Muhammad as the final prophet.

Some of the Muslims sat in the front row, across from the altar where Adel Kermiche and Abdelmalik Petitjean, both 19, filmed themselves performing an Islamic sermon before slitting the elderly priest's throat

Similar interfaith gatherings were repeated elsewhere in France, as well as in neighboring Italy.

At Paris' iconic Notre Dame cathedral, Dalil Boubakeur, the rector of the Mosque of Paris, said repeatedly that Muslims want to live in peace.

'The situation is serious,' Boubakeur told BFMTV. 'Time has come to come together so as not to be divided.'

In Italy, the secretary general of the country's Islamic Confederation, Abdullah Cozzolino, spoke from the altar in the Treasure of St. Gennaro chapel next to Naples' Duomo cathedral. Three imams also attended Mass at the St. Maria Church in Rome's Trastevere neighborhood, donning their traditional dress as they entered the sanctuary and sat down in the front row.

Mohammed ben Mohammed, a member of the Union of Islamic Communities in Italy, said he called on the faithful in his sermon Friday 'to report anyone who may be intent on damaging society. I am sure that there are those among the faithful who are ready to speak up.'

A few dozen Muslims gathered at the towering Gothic cathedral in Rouen, near Saint-Etienne-du-Rouvray where the 85-year-old Rev Jacques Hamel had his throat slit by two teenage Islamic extremists on Tuesday

Ahmed El Balzai, the imam of the Vobarno mosque in the Lombard province of Brescia, said he did not fear repercussions for speaking out.

'I am not afraid. ... These people are tainting our religion and it is terrible to know that many people consider all Muslim terrorists. That is not the case,' El Balazi said. 'Religion is one thing. Another is the behavior of Muslims who don't represent us.'

Italian Foreign Minister Paolo Gentiloni thanked Italian Muslims for their participation, saying they 'are showing their communities the way of courage against fundamentalism.'

Like in France, Italy is increasing its supervision of mosques. Interior Minister Angelino Alfano told the Senate this week that authorities were scrutinizing mosque financing and working with the Islamic community to ensure that imams study in Italy, preach in Italian and are aware of Italy's legal structuring.

The Paris prosecutor's office, meanwhile, said it has requested that a cousin of one of the two 19-year-olds who slit the priest's throat be charged with participating in 'a terrorist association with the aim of harming others.'

In a statement, it said it appeared a 30-year-old Frenchman it identified as Farid K. 'knew very well, if not of the exact place or time, of his cousin's impending plans for violence.'

The office added that a Syrian refugee detained in the wake of the attack was released Saturday.

Among the parishioners was one of the nuns who was briefly taken hostage at Hamel's church when Father Jaques, pictured, was killed

Adel Kermiche, left, and Abdelmalik Petitjean in a home video in which they pledge allegiance to ISIS

Archbishop Lebrun praised the Muslims who attended the Mass in Rouen.

'We are very moved by the presence of our Muslim friends and I believe it is a courageous act that they did by coming to us,' he said after the service.

Some of the Muslims present sat in the front row across from the altar.

One of the nuns who was briefly taken hostage at Father Hamel's church when he was killed was among the parishioners.

She joined her fellow Catholics in turning to shake hands or embrace the Muslim churchgoers after the service.

Churchgoer Jacqueline Prevot said the attendance of Muslims was 'a magnificent gesture.'

'Look at this whole Muslim community that attended Mass,' she said.

'I find this very heart-warming. I am confident. I say to myself that this assassination won't be lost, that it will maybe relaunch us better than politics can do. Maybe we will react in a better way.'