A 19-year-old man is in custody after making a threat against Grant Middle School Thursday morning.
CCISD Police Chief Kirby Warnke said Nathanial Salinas was arrested at about noon and is charged with making a terroristic threat.
The school at 4350 Aaron Drive was in a modified lockdown on Thursday after a social media threat to shoot it up was made. Warnke said investigators saw the threat and eventually determined Salinas wrote it.
The threat was made late Wednesday evening, according to a Facebook post sent by principal Carla Rosa-Villarreal on Thursday morning.
She immediately contacted CCISD police, who began a formal investigation.
The lockdown now has been lifted.