Authorities say a man accused of killing a woman and injuring a police officer and two others when he shot at passing cars along a Tennessee highway has been indicted on charges including murder and attempted murder.

The Tennessee Bureau of Investigation announced the indictment of 37-year-old Lakeem Keon Scott in a statement Tuesday. The statement says Scott also faces a charge of using a firearm during a felony for the shootings in Bristol last week.

Authorities have said they think Scott targeted police officers and others because he was troubled by incidents involving black people and law enforcement officers, but they're still investigating his possible motives.

Scott remains at a hospital, but was to be transferred to a jail after his release. It wasn't immediately clear whether he has an attorney.