TAFT, Okla. (AP) — Authorities said one person was killed and seven were injured in a shooting early Sunday at an outdoor festival in eastern Oklahoma, with a witness describing frantic people running for cover as the gunfire erupted.

Two juveniles were among those shot at the Memorial Day event near Taft, about 10 miles (16 kilometers) southeast of Tulsa, the Oklahoma State Bureau of Investigation said in a statement.

Witnesses said an argument preceded the gunfire just after midnight, the agency said. No one has been arrested, it said.

“We heard a lot of shots and we thought it was firecrackers at first,” said Sylvia Wilson, an owner of Taft’s Boots Cafe, which was open at the time to serve a surge of visitors to the small town for the Memorial Day weekend gathering. “Then people start running and ducking. And we were yelling at everyone … ’Get down! Get down!” Wilson said to The Associated Press by telephone from the café on Sunday morning.

About 1,500 people attended the event in Taft, which usually has a population of just a few hundred people. Members of the Muskogee County Sheriff’s Office were in attendance and immediately began rendering aid, OSBI said.

The agency provided no other details including the conditions of those injured. The Muskogee County Sheriff’s Office referred the AP to OSBI for more information. A bureau spokeswoman has not responded to the AP’s calls.

Wilson estimated her café is about 100 feet (30 meters) from where the shooting broke out. She said law enforcement had been on the scene to help with security earlier and that officers reacted quickly to the shooting.

“We are upset,” Wilson said, adding: “Everything is getting back to normal. The danger has passed.”