A Michigan man who refused to wear a mask was fatally shot by a sheriff's deputy after stabbing a customer who confronted him, officials say

• Sean Ernest Ruis, 43, was fatally shot by a sheriff's deputy in Michigan's Eaton County, near Lansing, on Tuesday.
• Officials say the shooting happened after Ruis stabbed a 77-year-old man at a convenience store who confronted him for not wearing a mask.
• The sheriff's office said a deputy pulled Ruis over less than an hour after the stabbing and shot him as he came toward her with a knife.

A sheriff's deputy fatally shot a man in Michigan after an altercation at a convenience store in which officials said the man stabbed a customer who had confronted him for not wearing a mask.

The man who was killed was identified by the Eaton County Sheriff's Office as Sean Ernest Ruis, 43.

The Michigan State Police said Ruis was inside a Quality Dairy in Windsor Township, near Lansing, at about 6:45 a.m. on Tuesday, not wearing a mask.

The store refused to serve Ruis and, at one point, a 77-year-old man from Lansing confronted Ruis.

Ruis responded by pulling out a knife and stabbing the 77-year-old, the police said. The 77-year-old was injured in the attack, though his condition is unknown.

Ruis fled the scene, the Michigan State Police said, and was stopped less than an hour later in Delta Township by an Eaton County sheriff's deputy.

Video of the incident shared by the Eaton County Sheriff's Office shows a man exiting the vehicle with a knife in hand. The deputy then backed up and told the man to drop the weapon, but he continued to advance, the sheriff's office said.

The deputy can be heard saying "drop the weapon" several times in the 10-second video.

The sheriff's office said that the deputy then fired her gun at the man but that he continued to approach her.

"She backed away from him while repeatedly ordering him to drop the weapon, but he continued to advance and attack and she acted in defense of her life," the sheriff's office said.

The agency is investigating the incident, and the deputy has been put on administrative leave, which is "standard procedure" when an officer is involved in a shooting, the sheriff's office said.

"Our thoughts and prayers are for the full recovery of the victim who was stabbed at the Quality Dairy and for his family, and are with our deputy who was subsequently violently attacked," the sheriff's office said.