The explosive device hits a convoy of the US-led coalition north of Baghdad on Tuesday. File photo

At least two explosions have hit convoys supplying US-led coalition forces in Iraq in the last 24 hours, security sources said, the first on Monday evening near the southern border with Kuwait and the second on Tuesday north of Baghdad.

The explosions, which caused no casualties but did some material damage, are the latest in a string of such incidents in recent weeks. An attack in southern Iraq on Sunday hit a convoy carrying supplies to coalition forces, the military said.

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Several thousand US forces are still based in Iraq, leading a coalition whose mission is to fight Sunni Muslim Islamic State militants.

Those forces are also a target for Iran-backed Shi'ite militias, which the United States blames for regular rocket attacks on bases hosting the coalition, and on other U.S. targets such as Washington's embassy in Baghdad.

The militias have vowed to avenge the death of paramilitary commander Abu Mahdi al-Muhandis, who was killed alongside Iranian military mastermind Qassem Soleimani in a US drone strike in Baghdad in January. Political forces aligned with the militias demand a full withdrawal of foreign troops from Iraq.

They also oppose Iraq's Prime Minister Mustafa al-Kadhimi, who took office in May. He is viewed as being friendly with the United States and has challenged the power of Iran-aligned armed groups in Iraq.

Reuters