A U.S. army sergeant from Fort Carson's 2nd Battalion was killed during combat on New Year's Day in eastern Afghanistan.

The U.S. Department of Defense says Sergeant First Class Mihail Golin, 34, died during a combat engagement on Monday near the Pakistan border. He was the first U.S. soldier killed in combat in 2018, the Army tells 9NEWS.

Golin, a resident of Fort Lee, New Jersey, was supporting Operation Freedom's Sentinel when he was killed.

Golin was born in Riga, Latvia, on Aug. 20, 1983. He moved to the United States in October 2004 and enlisted in the U.S. Army from Fort Lee in 2005.

Four other servicemembers were wounded in combat. Two of the wounded are hospitalized in stable condition and the other two were returned to duty, the military said.

Golin had been deployed three times prior this tour. He deployed once to Iraq in support of Operation Iraqi Freedom from September 2006 to November 2007, and twice to Afghanistan from February 2009 to February 2010 and from December 2011 to October 2012, both in support of Operation Enduring Freedom, the Army said.

The incident is under investigation.