It's a growing trend, and the Federal Bureau of Investigation Houston field division has reported at least 30 school shooting threats in August, more than any in the past three months.

Seven HISD students were arrested facing a rise in school threats, with FBI involvement due to numerous hoax reports.

The number of threats after a Georgia school shooting this month is much higher than usual, many officials said. In response, some have cracked down with arrests and detention for children as young as 10.