People gather at the site of a suicide bomb attack in Baghdad, Iraq, on October 29, 2016.

A suicide bombing claimed by ISIS targeted Shiite Muslims in the Iraqi capital on Saturday, killing at least four people, security and medical officials said.

The bomber targeted a tent in the Iskan area of western Baghdad where Shiites were distributing food and drinks to pilgrims making their way to the shrine city of Karbala, south of the capital.

The attack also wounded at least 16 people, officials said.

ISIS issued a statement claiming the attack in which it boasted that the bomber had successfully passed security checkpoints to carry out the attack.

The latest attack comes as Iraqi forces close in on Mosul, the last ISIS-held city in the country, after regaining much of the territory that the militants had overran in 2014.

But even their ouster from the northern city of Mosul is unlikely to bring an end to Isis bombings, and the militant group may increasingly turn to such attacks as they continue to lose ground.

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