ST. JOSEPH, Mich. (AP) — A soldier at home in Michigan during the holidays was ambushed and killed by another soldier on New Year’s Eve in a plot that involved the victim’s wife, authorities said Monday.

Kemia Hassel, 22, and Jeremy Cuellar, 24, were charged with murder in Berrien County in southwestern Michigan. They’re active duty soldiers at Fort Stewart in Georgia and were having an extramarital affair, prosecutor Mike Sepic said.

Sgt. Tyrone Hassel III, who was also stationed at Fort Stewart, was killed in St. Joseph Township after bringing food to his wife from a family gathering. The 23-year-old was a native of the Benton Harbor area and had a 1-year-old son with Kemia.