UPDATE (5:13 p.m. on Sunday, Aug. 21): Nine people were arrested after an incident at the Kentucky State Fair on Saturday night.

Kentucky State Police say that a group of individuals “caused panic with noise-making devices” and that patrons of the fair thought the noises were gunshots.

KSP says they arrested eight people and that Kentucky Fair Board Police arrested one person. Of those people, police say that three were adults, and six were minors. Those people face charges of disorderly conduct, menacing, possession of stolen property and possession of a handgun.

State Police added that they have not yet found any physical evidence that any firearm was used during the incident.

This is a developing story.

LOUISVILLE, Ky. (AP) — Several people were arrested at the Kentucky State Fair, which closed early Saturday night after suspicious activity was reported to law enforcement, authorities said.

Kentucky State Police said in a statement on Twitter that the fair began a “soft close” at about 10 p.m. to ensure the safety of attendees. Police confirmed there have been no reported injuries.

Police have not released any additional details about the incident but local media outlets have confirmed people were running from reported gunfire.

The identities of the people who were arrested have not been made public. An investigation is ongoing.

The fair will resume normal operations on Sunday, officials said.

The Kentucky State Fair, which began Thursday, is an annual multiday event held at the Kentucky Exposition Center in Louisville.