A security source told Shafaq News Agency that an explosive device targeted the convoy near Hakel Saba Bridge, south of Nasiriya, Dhi Qar.
The attack did not resulted in any causality but damage a vehicle of the convoy.
There was no claim of responsibility.
This is the second attack within hours; the first took place in Baghdad Governorate.
No causalities were registered.
On January 5, the Iraqi parliament voted by majority to end the foreign military presence on the country's territory, following the killing of the Iranian Quds Force commander, Qassem Soleimani, and the deputy head Al-Hashd Al-Shaabi, Abu Mahdi Al-Muhandis, in an American airstrike near Baghdad International Airport.
Washington accuses armed Iraqi factions linked to Iran of being behind the attacks.