A New Hampshire man was sentenced Wednesday to more than 10 years in prison for his role in a violent home invasion robbery in Lyman.

Xavier Watson, 24, of Brentwood, New Hampshire, was sentenced in Portland by U.S. District Court Judge Jon D. Levy to serve 10 years and one month in prison with three years of supervised release.

Watson pleaded guilty in October to charges of robbery and brandishing a firearm during a crime of violence.

Watson’s accomplices in the home invasion – 20-year-old Andre Thomas of Lawrence, Massachusetts, 19-year-old Vincent Casazza of Newmarket, New Hampshire, and 23-year-old Reynan Mora of Lowell, Massachusetts – have all pleaded guilty, but have yet to be sentenced.

The men were indicted a year ago by a York County grand jury on charges of breaking into the Lyman home and holding a family of five hostage at gunpoint while they stole firearms, medical marijuana, cash and electronic equipment.

Watson and the men drove from New Hampshire to Maine in January 2016 for the purpose of committing a home invasion robbery of a licensed medical marijuana caregiver, Acting Assistant U.S. Attorney Richard W. Murphy said in a statement Wednesday.

Murphy said Watson and the men broke into the home brandishing a pistol and a shotgun. Watson was armed with the pistol.

Court records introduced at sentencing indicate that Watson “also sexually assaulted a 17-year-old female victim during the robbery,” Murphy said, without providing additional details on the alleged assault.

Watson and his accomplices stole three firearms from the home, as well as cash, marijuana, various electronics and other items of value, Murphy said. The case was investigated by the Bureau of Alcohol, Tobacco, Firearms and Explosives and the Maine State Police.