HOUSTON - One person was killed and three others injured late Sunday afternoon in a shooting incident in Baton Rouge, capital city of the US state of Louisiana.

The shooting occurred about 5:30 pm local time (2330 GMT) at the United Plaza Boulevard in Baton Rouge, and three people were sent to the hospital, one after being hit by gunfire and the other two after being hit by the suspected shooter's vehicle, according to the state's English daily, the Times-Picayune.

A police source said that it is believed a man and a woman were traveling together in a car. The man allegedly shot the woman and pushed her out of the vehicle. EMS staff and some passers-by were trying to help the woman, then the suspect drove his car into the crowd and started shooting, injuring three people.

Louisiana State Police confirmed that the gunman, who killed the woman and fled the scene, was later shot and killed in a shootout with police officers on Sunday night.

Police have begun investigating the cause of the shooting.

This is the second shooting incident in the state on Sunday, which also saw a shooting in the state's largest city of New Orleans earlier Sunday morning, which left one person and nine others wounded.