VIENNA, Ga. — Residents of this small Middle Georgia town were still trying to understand a deadly burst of gunfire that killed two people and injured 35 at a block party early Sunday, as investigators worked to determine what led to the shooting. The Georgia Bureau of Investigation reported the death and injury toll. The shooting happened on West Pine Street, near Spruce Lane, in a neighborhood of mostly mobile homes. By Monday, authorities had not publicly identified a motive or announced arrests. Neighbors described hearing what they first took to be fireworks before people scattered. Lisa Bryant, who lives nearby, said the noise and the rush of people trying to get away unfolded in the early morning hours. The scale of the violence has left residents searching for information about what happened and worrying about safety in a community where people know one another. At a Vienna pharmacy, pharmacist Michelle Priest helped care for some of the wounded and heard accounts from victims and families. The shooting’s impact was visible in the days afterward, as residents returned to the area and tried to make sense of the losses and injuries. The investigation continued Monday, but officials had released few details about the circumstances of the shooting. For people in Vienna, the unanswered questions have become part of the aftermath: a community grieving two deaths while dozens of others recover from injuries.