The three Florida teens found shot to death last week were killed by three other juveniles in a gang-related triple-homicide, Marion County Sheriff Billy Woods said.

The sheriff announced the arrest of two juveniles, including a 12-year-old, during a news conference on Friday. Deputies are still searching for a third teen wanted in connection to the killings.

“Now we were shocked and saddened by the violence as all of my citizens,” Woods said. “Not only are the victims juveniles, the murderers are juveniles, as well.”