Authorities say one person was killed and seven were injured in a shooting early Sunday at an outdoor festival in eastern Oklahoma. The Oklahoma State Bureau of Investigation said in a statement that two juveniles were among those shot at the Memorial Day event near Taft, about 10 miles southeast of Tulsa.

The agency reports that witnesses said an argument preceded the gunfire just after midnight. No one has been arrested. OSBI says about 1,500 people attended the event and that members of the Muskogee County Sheriff’s Office who were also in attendance immediately rendered aid to those who were shot.

About 1,500 people were in attendance at the festival at the Old City Square in Taft, Oklahoma, about 45 miles southeast of Tulsa, when the shooting took place early Sunday, according to a statement from the Oklahoma State Bureau of Investigation.

Witnesses told investigators the gunfire erupted after an argument took place just after midnight, authorities said. Two juveniles were among the injured.

The Muskogee County Sheriff’s Office was in attendance at the event and immediately rendered aid to the victims, authorities said. The identity of the deceased victim has not been released. No suspects have been taken into custody, authorities said. Officials are asking anyone who may have a tip to contact the Oklahoma State Bureau of Investigation.