Walmart Mass Shooter Had Manifesto on Phone, Report

The Walmart manager who fatally shot six people inside the Virginia department store kept a manifesto on his phone -- complaining about his job and other coworkers.

Andre Bing reportedly wrote in his manifesto that he was upset about a recent, unspecified change in his employment status. He also claimed he was being harassed about the change by his fellow employees ... according to NBC News affiliate WAVY.

The report, which cites a law enforcement source, stated cops found the manifesto in Bing's phone after he killed himself following Tuesday's massacre. First responders also discovered an apparent "hit list" near Bing's body with the names of employees the killer presumably wanted to eradicate.

One of Bing's colleagues told WAVY she believes he planned the shooting, claiming he had issues with other workers.

Other colleagues told CNN Bing allegedly said he would retaliate and be remembered if he ever got fired. They described Bing as "condescending" and "quite mean" to other employees. They also said Bing was paranoid the government was watching him.

As we reported ... Bing was armed with a pistol when he entered the employee break room of the Walmart in Chesapeake, VA. He opened fire at the other workers before turning the gun on himself.