President Donald Trump signed two executive orders Thursday banning any transactions by US residents and companies with Chinese-owned social media apps TikTok and WeChat beginning Sept. 20.

"Specifically, the spread in the United States of mobile applications developed and owned by companies in the People’s Republic of China (China) continues to threaten the national security, foreign policy, and economy of the United States,” the orders said.

Both orders also said the country “must take aggressive action” against the owners of TikTok and WeChat “to protect our national security.”

On Aug. 3, Trump gave prospective buyers of TikTok’s US operations until Sept. 15 to forge a deal, threatening to otherwise ban the video app in the country.