Some experts interpreted initial reports that the attacks last week by jihadi gunmen in Paris were conducted on behalf of Al Qaeda in the Arabian Peninsula (AQAP) as a sign of competition between officially sanctioned Al Qaeda groups and a break-away Al Qaeda franchise, the Islamic State (also known as ISIS and ISIL). A video released Wednesday, by the head of AQAP, claiming that it ordered, planned and funded the attack will be interpreted by these experts as consistent with this assessment.

However other information suggests the Paris attacks may actually represent a new and dangerous collaboration between radical Islamist groups.

I believe the conflicting information on the Paris assailants’ terrorist group ties confirms reports of growing collaboration between Al Qaeda groups and the Islamic State and strongly suggests the Paris attacks were not evidence of competition between these groups.

Two of the gunmen were heard saying said they attacked the Charlie Hebdo magazine on behalf of AQAP. One gunman, Cherif Kouachi, told a French news network that Yemeni-American AQAP official Anwar al-Awlaki, who was killed by a U.S. drone strike in 2011, sent him to France and financed his trip. An AQAP official also made this claim in a video released overnight.

I believe the conflicting information on the Paris assailants’ terrorist group ties confirms reports of growing collaboration between Al Qaeda groups and the Islamic State and strongly suggests the Paris attacks were not evidence of competition between these groups.

According to CNN, Said Kouachi, another gunman and Cherif’s brother, spent several months in Yemen in 2011 receiving training from AQAP.

The link to Awlaki is significant since he influenced or directed at least a dozen terrorist attacks and plots, including the 2009 Fort Hood shooting, the 2010 printer cartridge bomb plot, and the Boston Marathon bombing.

Awlaki recruited and trained terrorist operatives, including Umar Farouk Abdulmutallab, the “underwear bomber” who attempted to blow up a civilian airliner over Detroit on Christmas Day 2009. According to the Wall Street Journal, Said Kouachi befriended Abdulmutallab in Yemen and the two lived in the same dormitory.

The links between AQAP and the attack on the Charlie Hebdo office has led some experts to conclude that the Paris attacks were an attempt by Al Qaeda to reclaim the international spotlight from the Islamic State and could reflect a continuing feud between these terrorist groups. One terrorism analyst said the Paris attacks were a sort of “jihadist olympics” in which Al Qaeda was attempting a “comeback tour” to regain recognition as the world’s radical Islamist “top dog.”

This story became more complicated late last week when one of the Paris gunmen, Amedy Coulilbaly, claimed in a video released after he was killed that he acted on behalf of the Islamic State. Reports have also surfaced that Cherif and Said Kouachi visited Syria last summer. Coulilbaly’s wife, Hayat Boumeddiene, who is a suspect in the Paris shootings, fled to Syria early this month.

I believe the conflicting information on the Paris assailants’ terrorist group ties confirms reports of growing collaboration between Al Qaeda groups and the Islamic State and strongly suggests the Paris attacks were not evidence of competition between these groups.

The feud that caused a break between the Islamic State and Al Qaeda began in the spring of 2013 when the al-Nusra Front (the official Al Qaeda franchise in Syria) and Al Qaeda leaders in Pakistan opposed an attempt by the Islamic State to merge its organization with al-Nusra. Some experts believe this was because Al Qaeda and al-Nusra leaders objected to the Islamic State’s brutal tactics. There appears to be some truth to this explanation since the al-Nusra Front at the time was working closely with and trying to co-opt non-Islamist Syrian rebel fighters. Moreover, an AQAP leader condemned Islamic State beheadings as un-Islamic.

However, the Islamic State/Al Qaeda split was also driven by personality differences and a struggle for power since Islamic State leader Abu Bakr al-Baghdadi refused to take orders from Al Qaeda leaders in Pakistan.

Despite their differences, the Associated Press reported that the al-Nusra Front and the Islamic State agreed during a meeting in November to stop fighting each other and work together against common enemies in Syria. Jund al-Aqsa, an Islamic State affiliate and the Khorosan Group, an Al Qaeda affiliate, also attended the meeting. There were some reports that the cooperation agreement was in response to U.S. airstrikes in northern Syria.

Al-Nusra attacks on moderate rebels in northern Syria last November may have been a sign of shifting alliances due to this reported Al Qaeda/Islamic State rapprochement.

I believe collaboration between the Islamic State and Al Qaeda affiliated groups probably has been growing over the last year as the Islamic State became known as the world’s most effective and best funded radical Islamist group. There have been reports of Islamist groups in Syria, north Africa, Libya and other areas swearing allegiance to the Islamic State over the last year as well as probable Islamist State-inspired terrorist plots in the United States, Canada, the United Kingdom, Australia, Algeria, Lebanon, and other countries.

So if there is cooperation between Al Qaeda and the Islamic State to attack Western targets, why would AQAP claim sole responsibility for the Paris attacks? The most likely reasons are to appeal to Gulf state donors and because Al Qaeda still has a difficult relationship with the Islamic State.

I believe this adds up to a more dangerous threat than rival radical Islamist groups striving to make headlines by staging competing terrorist attacks. By cooperating, Al Qaeda and the Islamic State can more effectively prepare Islamist terrorists for attacks against Western targets by utilizing multiple training sites, sources of weapons and funding. Such a wide terrorist support structure may produce better trained terrorists who will be harder to detect Western security services.

The likelihood that the Paris attacks indicate collaboration, not competition, between the Islamic State, Al Qaeda, Al Qaeda in the Arabian Peninsula and possibly other radical Islamist groups requires an urgent and coordinated response by the United States and its allies. This response must start with President Obama acknowledging that radical Islam is at war with the West and has redoubled its efforts to use violence to impose its violent Sharia ideology worldwide.