"The US cannot escape forward and blame others for the consequences of its illegal presence in Iraq and the reaction of the country's people to the assassination and killing of Iraqi commanders and fighters," Mousavi said on Friday.
“Instead of making dangerous moves and baseless accusations, Mr. Trump should thoroughly review the presence and behavior of his forces in the region,” he added.
The Iranian spokesman further urged Washington to seriously avoid spreading "the virus of diverting attention and playing blame game" with the aim of justifying its illogical behavior and evading responsibility.
Mousavi was suggesting that such attacks on US bases in Iraq are the consequences of its illegal presence in the Arab country.
A rocket attack on Wednesday hit a military base housing American troops near the capital Baghdad. The attack against Taji military camp killed three members of the US-led coalition, including two Americans and one Briton.
No group has yet claimed responsibility for the attack in which some 18 107mm Katyusha rockets struck the US-occupied camp.
However, Trump on Thursday claimed that the attackers were a group that “most likely looked like it could be backed by Iran.”