One person died and another injured after an unidentified man opened fire at a supermarket in Richland, Wash., around 11 a.m. Monday, officials said.

Shortly after the fatal shooting, police released a photo of the suspected shooter – a middle-aged white man last seen wearing a plaid shirt, black waistcoat, black gaiter over his nose and sweatpants. light color. He reportedly walked into the Fred Meyer store pushing a shopping cart with a black backpack into the basket.

The suspect is “still at large,” Richland city spokeswoman Hollie Logan told The Daily Beast, and authorities have asked the public for help in locating him.

“The suspect should be considered armed and dangerous,” police warned, adding that he “left the store and it is unclear whether he left on foot or in a vehicle.”

The injured person was identified by cops as an employee of Fred Meyer. The person who was killed did not work there, according to local reports.

Richland Police Department officers swarmed the market after receiving reports of an active shooter inside the store at 11:03 a.m. “Initial reports were of possible shouting and gunfire in the store,” police said.

The Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) confirmed to The Daily Beast that officers from its Seattle office also responded to the scene.

A witness told the Tri-City Herald that they heard “at least 10 shots” fired.

The man who was killed got into a heated argument with the unnamed gunman moments before he was shot, Commander Chris Lee said at a Monday afternoon news conference. However, investigators do not know what it was or if the two knew each other before.

Police have identified the suspected shooter, according to acting Richland PD chief Brigit Clary, who did not name the suspect but said police were working hard to locate him.

“I understand this is a concern for the community,” Clary said Monday. “This is certainly a tragic, tragic incident. Just know that we will have continued efforts, concentrated efforts to apprehend the suspect as quickly as possible.

At least six schools in the area have been locked down due to the shooting. Police have asked residents to avoid the area.