The suspect was arrested on suspicion of first-degree intentional homicide, Commander Norman Johnson of the Antioch Police Department said. Antioch is about 20 miles southwest of Kenosha.
The shootings unfolded amid protests over Jacob Blake, a Black man shot during an encounter with Kenosha police last Sunday.
Two people were killed and a third was sent to the hospital with serious, but non-life-threatening injuries after the shots rang out near 63rd Street and Sheridan Road around 11:45 p.m. Tuesday, the Kenosha Police Department said in a statement.
Cellphone video circulated on social media showing a young, White male running down the street with a long gun, as he was chased by demonstrators from behind. He fell to the ground, and someone tried to grab his weapon and came out him with a fly-kick. The individual then opened fire in the middle of the street, and screams could be heard from the frantic crowd.
WARNING: VIDEO BELOW IS GRAPHIC
It was unclear how many people fired in all.
The Kenosha County Sheriff’s Office said it was investigating whether the shooting was connected to a group of armed vigilantes guarding a gas station nearby.
This is a developing story; check back for updates. The Associated Press contributed to this report.