12-year-old boy was arrested after he showed off a handgun in his backpack to classmates and it fired into a table at a Southern California middle school, authorities said. No one was hurt.

In at least 136 instances of gunfire this past fall, some 26 people were killed and 96 wounded, the highest number n a five-month period since 2013.

Crumbley was charged last month with multiple felony charges, including terrorism, in connection with the rampage.

Students will rotate between in-person and virtual at the middle school until repairs are complete at the high school on Jan. 24.