The investigation comes amid heightened regional tensions stemming from the US and Iran conflict, in which Iraq has avoided drawn directly into hostilities.
The move comes after Iraq's ruling coalition, the "Coordination Framework", ended one of the country's most complex political crises in nearly five months.
On Monday evening, 23 March, the attack targeted the "Kharab al-Jir" base in Syria's Hasakah, which Damascus says US forces withdrew from in February 2026.