The 13-year-old Clair-Mel boy who was arrested for bringing a loaded handgun to Dowdell Middle School back in April now faces even more trouble: He is accused of threatening to conduct a shooting attack against the same school on social media, according to the Hillsborough County Sheriff's Office.

The boy, who was not identified in either case, was arrested at his home at about 4:30 p.m. Thursday on a felony charge of making written threats to kill, do bodily injury or conduct a mass shooting or act of terrorism, according to the Sheriff's Office.

The threats were made on social media "session" with someone at an undisclosed time, deputies said. The 13-year-old was upset, deputies said, because he was expelled from school after the April 26 gun incident and currently serving juvenile probation.

However, deputies said neither the school nor any students were in danger in this recent incident and that no weapon was found. The boy was taken to the Juvenile Assessment Center in Tampa.

In the April 26 incident, deputies said the 13-year-old brought a loaded semiautomatic Bersa Thunder .380-caliber pistol to Dowdell Middle. Witnesses said they saw the boy with a gun in his backpack and later saw him try to hide it a tractor tire outside the school, according to the Sheriff's Office. The gun was reported to school staff and found.

The boy ran away from school but was brought back by his mother. The boy did not speak to deputies about why be brought the gun to school. He was arrested then on a charge of possession of a firearm on school property.