Russia’s National Guard has confirmed that a Chechen commander was killed in a bloody firefight with foreign volunteers in Ukraine—and they singled out the son of a British lawmaker as one of those responsible.

Ben Grant, a 30-year-old former Royal Marine and the son of Helen Grant, a Conservative MP and Prime Minister Boris Johnson’s special envoy on girls’ education, joined British and U.S. servicemen fighting Russian forces in Ukraine back in March, telling British media at the time that he felt compelled to act after seeing footage of Russian troops bombing a home as a child screamed.

“I just want to make that clear, completely off my own back, I decided to do this. I didn’t even tell my mum, but it is what it is,” he said.

See Also:

Major IDF drill in Cyprus, hails “strategic alliance” between the two countries (photos)

Viral footage of fighting in the Kharkiv region published by The Daily Telegraph last week captured Grant and other Western volunteers, part of a Ukrainian counteroffensive to force Russian troops out of the region, under heavy Russian fire as they rescued a wounded fellow volunteer.

Read more: Daily Beast