On October 22, 2010, The New York Times reported that in the Iraq War documents leak, US intelligence analysts described why they thought al-Dulaimi had been trained in the "dark arts of paramilitary operation" by Iran and Hezbollah.

[5]Dulaymi reportedly obtained his training from Hizballah operatives near Qom, Iran, who were under the supervision of Iranian Islamic Revolutionary Guard Corps Quds Force (IRGC-QF) officers in July 2006.On October 25, 2010, the Foreign Policy Journal published an article skeptical of the conclusions The New York Times had drawn from the leaked documents.

[6] According to Kimberly Kagan's The Surge: A Military History, Dulaimi was "the executor of the Ministry of Health and Karbala attacks".

[7] Bill Roggio, writing in the Long War Journal also attributed an attack on the Karbala Provincial Joint Coordination Center to Dulaimi.

[8][9] According to Mark Urban's book on Special Forces in Iraq, Task Force Black, documents seized on March 20, 2007, when Qais Khazali and Ali Musa Daqduq were captured, described al-Dulaimi's role in the Karbala attack and provided sufficient information for the raid where al-Dulaimi died.