Authorities have identified five of the six people who were killed in a Virginia Walmart after the store’s manager began firing Tuesday night before killing himself.

Five of the deceased victims were identified as Lorenzo Gamble; Brian Pendleton; Kellie Pyle; Randall Blevins; and Tyneka Johnson. The sixth deceased victim was a 16-year-old boy who authorities are not naming because he was a minor, the city said.

All six victims were employed by Walmart.

Earlier Wednesday, the city identified the shooter as 31-year-old Andre Bing, saying he was “armed with one handgun and had multiple magazines on his person.”

Bing was an “overnight team lead” and had been employed with Walmart since 2010, the company said in a statement.

Authorities were digging into the shooter’s background Wednesday for information on what could have motivated the attack.

The US has suffered more than 600 mass shootings so far this year, according to the Gun Violence Archive. Most would define mass shootings as those in which four or more people are shot, not including the assailant.

At least 50 people were inside the Walmart when the violence erupted, police said. Some of them have begun publicly sharing their accounts of how a calm night turned into a horrifying tragedy.

The deadly rampage started around 10:12 p.m. Tuesday, less than an hour before the Walmart Supercenter was set to close.

The first officer arrived on scene within two minutes and officers entered the store roughly two minutes after that, at about 10:16 p.m.

Employee Kevin Harper said a colleague entered the breakroom and started shooting.

At least six injured people were transported to local hospitals for treatment, police said.

Four people injured in the shooting remained hospitalized Wednesday morning, Chesapeake Police Chief Mark Solesky said. At least two were in critical condition, said Dr. Michael Hooper, vice president and chief medical officer at Sentara Norfolk General Hospital.

“Three individuals, including the shooter, were located deceased in the break room of the store,” the city of Chesapeake tweeted. “One victim was located deceased toward the front of the store. Three other victims were transported to local hospitals for further treatment, but succumbed to their injuries.”

Customer Jeromy Basham, who was at the Walmart Tuesday night to buy tablecloths, said he heard the sound of the gunshots and a few seconds later, people began rushing out of the store.