Jim Michaels

USA TODAY

WASHINGTON — Two U.S. servicemen were killed in an operation against the Islamic State in Afghanistan, the Pentagon confirmed Thursday.

The special operations troops were conducting a raid in eastern Afghanistan on Wednesday when they were killed. A third American sustained minor injuries during the raid, which also involved Afghan security forces.

The names of the servicemen have not yet been released. The Pentagon did not immediately release further details of the incident.

The incident raises the death toll of American servicemen killed in combat in Afghanistan this year to three and highlights the emerging threat of the Islamic State in the country.