HASTINGS — A Farmington man is charged with killing his 84-year-old grandmother last week.

Dakota County prosecutors Monday charged 35-year-old Timothy Robert Steele with second-degree murder.

Steele is accused of killing Agnes Marie Wagner-Steele, also of Farmington, last Thursday.

Police were called to a home in Farmington where Wagner-Steele was found dead in her bedroom. Officers found injuries on the right side of her head.

According to court documents, Steele told police he hit his grandmother with a hammer seven or eight times in the head. He told investigators he was annoyed by his grandmother blowing her nose at dinner and also believed she caused a hole in one of his jackets.