BEIRUT — An Islamic State suicide bomber targeted a joint convoy of US and allied Kurdish forces in northern Syria on Monday, the second attack against US troops in less than a week.

US military Col. Sean Ryan said there were no casualties among the US-led coalition members. He added: “We can confirm a combined US and Syrian partner force convoy was involved” in the suicide bomb attack.

“We will continue to review the situation and provide updates as appropriate,” he added.

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The Kurdish Hawar news agency, based in northern Syria, said Monday’s blast targeted a Syrian Kurdish checkpoint as a coalition convoy was passing near the town of Shaddadeh. It said two Kurdish fighters were lightly wounded in the blast.

The Britain-based Syrian Observatory for Human Rights said the blast killed five people and wounded others.

Monday’s attack came days after a suicide attack killed 16 people, including two US service members and two American civilians, in the northern Syrian town of Manbij. It also came a month after US President Donald Trump announced his intention to withdraw troops from the war-torn country, declaring that IS had been defeated.

Islamic State claimed both attacks in statements carried by its Aamaq news agency.