Panama has complained to the United Nations over US President Donald Trump's "worrying" threat to seize the Panama Canal, even as it launched an audit of the Hong Kong-linked operator of two ports on the interoceanic waterway.

China has fired back at President Donald Trump, dismissing his claim that Beijing has seized control of the Panama Canal as baseless and provocative. Newsweek reached out by email to a Trump representative and to Hutchison Ports, a Hong Kong–based port operator that controls ports near the canal, for comment.