The United States, meanwhile, has remained upbeat about the prospects for talks with the DPRK, with Trump saying on Friday the firings did not violate his agreement with Kim.
The US Treasury Department announced the sanctions on Rosneft Trading SA, the Geneva-based trading unit of Rosneft, the world's largest listed oil company by output, as it targeted Russia over its alleged backing for Venezuela's efforts to skirt US sanctions.
The US remains the top destination for all international students. More than 363,341 Chinese students enrolled into US universities and colleges in the academic year 2017-18, accounting for one-third of the total 1.09 million international students in the country, according to the Open Doors 2018 report on education and culture from the US embassy in Beijing.
The US Federal Reserve announced a plan on Tuesday to purchase commercial papers directly from the companies issuing the short-term notes to keep credit flowing, on top of the 0 billion in quantitative easing announced on Sunday.
The United States' announcement of sanctions on Russian individuals and entities for the alleged US election meddling has aroused mixed reactions in Washington and beyond, with some hawks on Capitol Hill calling for more action, while Moscow said it is preparing retaliation.
The United States -- ranking first in the world in terms of both case number and death toll from COVID-19 -- has recently come under fire from academia. Journals including Nature and Science have started to take aim at the superpower's missteps in the pandemic.
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The UN chief's comments followed Trump's latest criticism of the international agency at a news conference a day before.
The U.S. government announced several travel restrictions as COVID-19 is spreading rapidly across North America and Europe.
The United Sates last year contributed the highest number of PCT filings at 56,142, followed by China at 53,345 and Japan at 49,702. For the first time filers in Asia contributed more than half (50.5 percent) of all international patent applications, then Europe (24.5 percent) and North America (23.1 percent).
The United States is mulling measures to bolster its economy against the impact of the novel coronavirus pneumonia outbreak, as the number of infections surges past 1,000 and dozens of universities such as Harvard are canceling in-person classes and turning to instruction online.