MINNEAPOLIS (WCCO) — Authorities are hoping a $2,500 reward will help them find a man accused of assaulting an 85-year-old in his home earlier this month.

Officials say shortly after 1 a.m. on Feb. 1, 85-year-old Robert Nelson woke up to a man with a handgun inside his home, in the midst of a robbery.

Police say the man assaulted Nelson, who suffered cuts to his face that required hospitalization.

The suspected robber was dressed in dark clothing and a ski mask. Police believe he wasn’t acting alone.

Nelson’s home is located on Latoka Drive, just west of County Road 45.

The suspect stole Nelson’s high school class ring — a 1943 gold ring with a large “L” from Lynd High School, with the initials “R.N.”

The robber also stole a red, plastic Folgers coffee container full of coins.

The Douglas County Sheriff’s Office is offering a $2,500 reward for information leading to the arrest and conviction of the suspects in this incident.

Anyone with information is asked to contact the sheriff’s office at 320-762-8151.