(CNN) The Transportation Security Administration has banned employee use of TikTok for the agency's social media engagement as the US questions whether the China-owned app poses a threat to national security.

The announcement came after Senate Minority Leader Chuck Schumer called attention to and urged the end of the TSA's use of the application in a statement Sunday , saying that federal agency security risks on the platform are "very real."

"A small number of TSA employees have previously used TikTok on their personal devices to create videos for use in TSA's social media outreach, but that practice has since been discontinued," the TSA said in a statement to CNN.

The agency said that while employees have posted from their own devices, it has not had an official TikTok account.

"The Transportation Security Administration (TSA) has an active and award-winning presence on several social media platforms. However, TSA has never published any content to TikTok nor has it ever directed viewers to TikTok," the TSA said in a statement.

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