Washington (CNN) Two US service members were killed in Afghanistan when their vehicle struck an improvised explosive device, the US-led coalition in Kabul said in a statement.

Two service members were also injured in the incident in the southern province of Kandahar. The service members, who were conducting operations as part of NATO's Resolute Support mission, have not been identified.

The Taliban claimed responsibility for the explosion.

Between 12,000 and 13,000 US troops are currently serving in Afghanistan as part of a US-led NATO mission to train, assist and advise Afghan forces.

There have been more than 2,400 total deaths of US service members since the start of America's longest war in 2001. Last year was the deadliest in five years for the US in Afghanistan, with 23 service members killed during operations in the country in 2019.

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