A U.S. service member fighting ISIS in Iraq was killed Saturday in an explosion outside of Mosul, the Pentagon said in a statement.
The soldier suffered fatal wounds from an “explosive device blast,” according to the Pentagon, which didn’t immediately provide further details.
It was the second time in the last six months a U.S. service member was killed fighting ISIS in the city.
Navy Petty Officer Jason Finan was killed last October by a roadside bomb north of Mosul.
The Pentagon has indicated that roughly 100 U.S. service members are fighting alongside Iraqi troops in Mosul as it cracks down on ISIS.
A couple hundred more U.S. troops are based outside the city for support.
The U.S. began launching attacks against ISIS in Iraq in 2014. Troop presences is as high as it was when the U.S. first left Iraq in 2011.
Saturday’s blast killed the third service member this week.
Two Army Rangers were killed fighting ISIS in eastern Afghanistan on Wednesday during a raid targeting the group’s local leader, killing some 35 militants in the process.
The Pentagon said Friday it was investigating whether the Rangers were killed by friendly fire.