The Amaq news agency, which is affiliated with the Islamic State (ISIS) jihadist group, on Thursday released a video purportedly showing one of the two terrorists who attacked a church in northern France this week, Reuters reports.

In the video, terrorist Abdel-Malik Nabir Petitjean is seen urging all Muslims to destroy France.

Petitjean was formally identified earlier Thursday as one of the men who killed a priest in the attack before being shot dead by police. The other terrorist has been identified as 19-year-old Adel Kermiche.

Petitjean addresses President Francois Hollande and Prime Minister Manuel Valls directly in Thursday's video, threatening, “The times have changed. You will suffer what our brothers and sisters are suffering. We are going to destroy your country.”

"Brothers go out with a knife, whatever is needed, attack them, kill them en masse," he says, calling on Muslims to attack allies of the international coalition forces fighting Islamist militants in Syria.

Reuters could not immediately verify the authenticity of the video.

The video comes a day after the release of another video in which both Petitjean and Kermiche are seen pledging allegiance to ISIS leader Abu Bakr al-Baghdadi.