ROUND ROCK, Texas ( — A third suspect has been arrested in connection with a deadly mass shooting at a community Juneteenth celebration in Round Rock last month.

Round Rock Police said Saturday that 18-year old Keshawn Dixon was arrested in Killeen and transported to the Bell County Jail. He’s facing a charge of deadly conduct, which is a third-degree felony.

The June 15 shooting, which left two people dead and 14 others injured, was reportedly sparked by a dispute between two groups, officials said. All of the victims are believed to have been innocent bystanders.

Dixon’s arrest follows the previous arrests of 17-year old Ricky Thompson III and another male juvenile. Thompson is facing a charge of aggravated assault with a deadly weapon.

RRPD says their investigation into the shooting is ongoing, with detectives pursuing leads involving additional suspects.