The video above is from ABC13's 24/7 livestream.
SkyEye captured lines of parents and a heavy police presence surrounding Sharpstown International School on Friday afternoon.
A viewer told ABC13 they aren't being allowed to pick up their kids.
ABC13 reached out to HISD about the incident. The district sent the following statement:
"We are aware of a reported security threat at Sharpstown International School involving a possible weapon on campus. HISD police and HPD are at the school and investigating. At this time, the threat is unsubstantiated. Students and staff are safe, and there have been no injuries reported. Out of an abundance of caution, the campus was placed on lockdown throughout the investigation and remains in a security hold. The campus team is working with parents who have arrived at the school on a controlled dismissal. We understand this is a scary situation for families, and HISD is in communication with them."
Eyewitness News is continuing to gather facts on the story.
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A school in Sharpstown was put on a brief lockdown after a reported security threat involving a possible weapon on the campus.