Who is the Iran-backed coalition Islamic Resistance in Iraq, responsible for deadly drone strike on US troops?

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Three American troops were killed and dozens more were injured in northeast Jordan Sunday in an attack that marked a major escalation of tensions in the region.

The Islamic Resistance in Iraq, a loose coalition of Iran-backed militant groups, is claiming responsibility for the deadly attack.

Per an analysis from the Pro-Israeli Washington Institute for Near East Policy, the "Islamic Resistance in Iraq," is not a singular unit per se but rather, an umbrella term used to tie the operations of various Iran-backed proxies in Iraq and Syria.

The report determined that an umbrella term obscures responsibility, making it more difficult to determine who is exactly responsible for attacks on U.S. targets.

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It is believed that the Islamic Revolutionary Guard Corps-Qods Force (IRGC-QF) – plays a role in organizing the loose coalition.

"Iraqi armed groups tend to jealously guard their individual identities and the credit they derive (directly or via façade groups linked to them) from attacks, so their willingness to submerge these identities and even recant an individual group attack claim suggests that higher power is coordinating them," the Washington Institute report says.

Many of the attack claims by the IRI brand have been published on the Telegram