POTTSBORO, Texas (KTEN) -- The Grayson County Sheriff's Office has now made four arrests following Sunday morning gunfire at the Tanglewood Resort complex in Pottsboro.

The only adult in the group was identified as 18-year-old Mark McDougall, who's being held on one count of aggravated robbery and two counts of aggravated assault with a deadly weapon.

The other three suspects are juveniles and their names can't be released. They are being charged with the same offenses.

The sheriffs office said two males were going to sell marijuana to one of the suspects when one of the suspects pulled out a handgun and robbed the two victims of their drugs.

An argument led to shots being fired. Two victims suffered non-life threatening injuries.