In a sharp escalation of tensions between the two superpowers, China announced on Tuesday that it would expel American journalists working for The New York Times, The Wall Street Journal and The Washington Post. It also demanded that those outlets, as well as the Voice of America and Time magazine, provide the Chinese government with detailed information about their operations.

The announcement, made by China’s Ministry of Foreign Affairs, came weeks after the Trump administration limited to 100 the number of Chinese citizens who can work in the United States for five state-run Chinese news organizations that are widely considered propaganda outlets.

China instructed American journalists for the three news organizations whose press credentials are due to expire this year to “notify the Department of Information of the Ministry of Foreign Affairs within four calendar days starting from today and hand back their press cards within ten calendar days.” Almost all the China-based journalists for the three organizations have press cards that expire this year.

The announcement went on to say that the American journalists now working in mainland China “will not be allowed to continue working as journalists in the People’s Republic of China, including its Hong Kong and Macao Special Administrative Regions.” The two territories are semiautonomous and in theory have greater press freedoms than the mainland.