Talha Asmal was one of four suicide bombers who attacked security forces near an oil refinery south of Baiji.
ISIS social media reports said Asmal, going by the name of Abu Yusuf al-Britani, had taken part in the attack. His family, believed to be of Pakistani origin, said they were "devastated" at the news.
If confirmed, Asmal, from Dewsbury, would be Britain's youngest known suicide bomber. Another West Yorkshire teenager, Hasib Hussein, was almost 19 when he blew himself up on a London bus in the July 7, 2005 attacks.

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