Three people have been injured during a horror accident at a festival after a minivan plowed through the crowd.

A woman driving a red minivan crashed through barricades and parked cars into the KIPONA Festival in Pennsylvania about 6pm on Monday night, sparking chaos as terrified revelers ran to safety.

A six-year-old boy, a woman in a wheelchair and a male employee of the traffic engineering department in Harrisburg were injured during the incident, Harrisburg Police Commissioner Thomas Carter told ABC.

According to Mayor Wanda Williams, the little boy is in a critical condition. The two adults are reportedly in stable conditions.

The driver is in custody, the Dauphin County District Attorney’s Office said. Police have not yet released her identity or any further details about what caused the incident.

The car crashed through South Front Street, where vendors had set up their stalls.

An ABC27 News reporter was there at the time of the crash and recalled witnessing people screaming and running. 

She described it as a ‘chaotic scene.’

One of the festival vendors, Lottie Beauverd, told the publication ‘this car came flying down through here fast.’

‘Not yelling or anything, but just flying down through this.’

The minivan sustained damage to the bumper and hood, while debris was seen around the scene of the incident.

Yellow crime police tape has been set up around the vicinity of the incident as police investigate the crash.

The festival was just wrapping up after three days of carnival rides, food and art vendors and cultural performances when the crash occurred.

 It takes place every year during Labor Day weekend, running from Friday to Monday.