Dumas Police Chief Keith Finch gave the increased death toll but said it was not immediately clear how many children were injured.
One person is in custody, although there may have been multiple shooters, Finch told reporters.
State troopers were dispatched to Dumas, about 90 miles south of Little Rock, about 7:25 p.m. after gunfire was reported outside a local store where the car show was being held, Arkansas state police spokesman Bill Sadler said.
The auto show is part of a community event held each spring to raise funds for scholarships and school supplies, according to the Delta Neighborhood Empowerment Youth Organization website.
Wallace McGehee, the organizer of the auto show, offered his condolences to the families of the victims and the community.
“For something like this to happen is a tragedy,” McGehee told KATV at the scene. “We’ve done this for 16 years with no problems.”
Chris Jones, a Democrat running for Arkansas governor, tweeted that he attended the event earlier Saturday, registered voters and enjoyed “a positive family atmosphere.”
“I am deeply saddened (and honestly upset) by this tragedy,” Jones said in a statement.
Further information, including the condition of the wounded, was not immediately available.
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https://abc13.com/arkansas-shooting-dumas-car-show-in/11666411/ At least one was killed and 20 wounded in a shootout at an Arkansas auto show