A man opened fire on a highway in Tennessee because he was troubled by incidents involving black people and law enforcement officers, authorities said on Friday.

In a news release, the Tennessee Bureau of Investigation said initial conversations with the suspect, identified as Lakeem Keon Scott, revealed he was troubled by incidents across the U.S.

The Tennessee Bureau of Investigation said Scott is black, while the shooting victims are white.

Investigators say Scott killed one person and wounded three others, including a police officer.

Jennifer Rooney, a Bristol Herald Courier newspaper carrier, was killed after being shot while driving in her vehicle on Volunteer Parkway.

Officer Matthew Cousins sustained a wound to the leg, but was treated and released from a local hospital.

According to WJHL, Scott had two guns early Thursday morning when he shot at a motel in Bristol, Tennessee, and then shot at several passing cars. When he was confronted by police, he fired at the three officers who responded.

Scott was shot by the officers and is being treated at a hospital. He has not yet been charged.

In the span of four days, two black men are dead at the hands of police and the country is wrapping its collective head around the deadliest day for U.S. law enforcement since 9/11.

Shootings in Louisiana, Minnesota and Texas are all in the initial investigation stages.

In Baton Rouge, Alton Sterling, 37, was fatally shot Tuesday during a struggle with two police officers outside of a convenience store where he was selling CDs.

Philando Castile, a black 32-year-old cafeteria supervisor at a public school, was shot Wednesday night in suburban St. Paul, Minnesota, during a traffic stop that involved two officers.

In Dallas, five police officers were fatally shot and seven were injured when shots were fired during Thursday night's downtown protest over the deaths of Sterling and Castile. Two civilians were also injured.

(The Associated Press contributed to this report)