China said on Tuesday that Vice Premier Liu He will go ahead with a visit to the United States this week, after efforts to reach a deal to end a trade war were thrown into doubt by US President Donald Trump's vow to impose new tariffs.

The United States is sending an aircraft carrier strike group and a bomber task force to the Middle East in a "clear and unmistakable" message to Iran, National Security Advisor John Bolton said Sunday.

A request by the United States to extradite WikiLeaks founder Julian Assange for one of the biggest ever leaks of classified information will be heard by a London court on Thursday.

Young migrants in New Jersey who are seeking legal status in the United States after allegedly suffering abuse or neglect in their home countries sued the Trump administration on Monday, saying it is unfairly denying their claims.

North Korean leader Kim Jong Un told Russian President Vladimir Putin that peace and security on the Korean peninsula depended on the United States, warning that a state of hostility could easily return, North Korean media said on Friday.

Julian Assange would cooperate with Swedish authorities if they reopen a rape case against him but will continue to resist any bid to extradite him to the United States, his lawyer said Sunday.

Iranian President Hassan Rouhani on Tuesday defended the elite Islamic Revolutionary Guard Corps as protectors of Iran a day after the United States labeled the group as a foreign terrorist organisation.

A South African court ruled Monday that a Mozambican ex-finance minister, held since December on a US warrant over corruption allegations, can be extradited to the United States.

The Trump administration on Sunday doubled down on its threat to shut down the southern border with Mexico, a day after it cut aid to Central American countries which President Donald Trump blasted for deliberately sending migrants to the United States.

Members of the Saudi team that killed journalist Jamal Khashoggi received training in the United States, the Washington Post has reported, revealing other new elements in the death of the newspaper's former contributor.

The United States and China said they made progress in trade talks that concluded on Friday in Beijing that Washington called "candid and constructive" as the world's two largest economies try to resolve a bitter, nearly nine-month trade war.

The United States on Monday accused Russia of "reckless escalation" of the situation in Venezuela by deploying military planes and personnel to the crisis-stricken South American nation that Washington has hit with crippling sanctions.