Two students are in police custody after a social media post threatening Duncanville High School prompted a police investigation and increased security measures when students return to school Monday.
According to Duncanville ISD, school officials were notified about the social media post Sunday.
Duncanville ISD called the post "concerning" and said that it "prompted a police investigation" in a statement on Twitter.
On Monday, students will see additional security measures, including increased police visibility and the use of metal detectors at entrances.
Duncanville ISD police worked with local law enforcement to determine the authenticity of the threat and to identify the person who created the post.
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"Making a threat toward a school district is a criminal offense whether it is a hoax or not," Duncanville ISD said in a statement on Twitter. "School officials and law enforcement take these cases seriously and conduct thorough investigations. When identified, this person could face criminal charges."
Duncanville High School released a statement on Twitter Sunday night saying that police have identified the source of the social media threat, which was originally shared to Instagram.
"Two students are currently in police custody," Duncanville High School said in a statement on Twitter. "This social media threat appears to be a hoax."
Duncanville High School also said that classes will be held on Monday and that counselors would be available.