"We are deeply concerned that Swedish citizen Gui Minhai was detained on January 20. We call on Chinese authorities to explain the reasons and legal basis for Mr. Gui’s arrest and detention, disclose his whereabouts, and allow him freedom of movement and the freedom to leave China," the statement read.
Washington and its European allies share the principles of liberty, equality, and human dignity.
"We will continue to coordinate with our partners, allies and regional organizations on promoting greater respect for human rights in China," the document concluded.
Last week, media reported that Gui had been apprehended in China in the presence of two Swedish diplomats while en route to a medical examination at the Swedish embassy in Beijing. Stockholm and Brussels have condemned Beijing’s actions and called for Gui's immediate release.
Chinese Foreign Ministry spokeswoman Hua Chunying said on Wednesday that Sweden and the European Union had no grounds to call for Gui’s release.
Gui, 53, has been known for publishing satirical books about the Chinese political elite. Beijing suspects Gui of being involved in a deadly car accident in 2003.