US

A US Navy submarine carrying nuclear-tipped ballistic missiles is visiting Guam for the first time since the late 1980s and US and Japanese troops will practice amphibious landings on Pacific islands.

The submarine USS Pennsylvania (SSBN 735) is making what the Navy formally calls a "scheduled port visit" to the US territory in the Pacific, according to a Navy press statement.

But a US defense official says that both Japanese and South Korean delegations are in Guam at this time and will be offered rare tours of the submarine.

"The Department of State made this decision based on security information indicating extremist groups are continuing aggressive efforts to attack US citizens in areas of Istanbul where they reside or frequent," the warning said.

The warning goes beyond the one issued Monday that urged Americans to avoid traveling to southeast Turkey, especially urban centers near the Turkish-Syrian border, because of recent terrorist attacks.

Turkey has become increasingly volatile in the past year because of terrorist attacks at home and its involvement in the Syrian civil war.

"I want them out," he said. "And if I have to revise or abrogate agreements, executive agreements, I will."

Speaking to business leaders in Tokyo during an official visit to Japan, Duterte warned that he would not be a "doormat" for the international community. But he also sought to reassure neighbors and allies that his state visit to Beijing a week ago was focused on trade, not security.

The Republican nominee also said he would do "whatever you have to do to get a strong agreement," even if that meant breaking off the recently-resumed diplomatic relations.

"I just want to press -- would you break off diplomatic relations, though, on day one?" CBS4's Jim Defede asked Trump.

The Musudan missile has an estimated range of up to 4,000 km (2,500 miles), enough to hit South Korea, Japan and the US territory of Guam.

Pyongyang has not reacted to the news.

The country has made a number of missile-related tests this year, despite being banned by the UN from any use of ballistic or nuclear technology.

It comes amid concerns that the North may soon launch another long-range rocket or conduct a nuclear test.

The test took place near the north-western city of Kusong at 03:33 GMT on Saturday, the Pentagon said in a statement.

She had been asked to give sworn responses to 25 written questions from a conservative legal group.

At least 21 responses used variations of "does not recall", the documents, provided by her lawyer, show.

Mrs Clinton denies handling classified information in her private emails.

Questions over her use of a private email server while secretary of state have dogged her presidential campaign.

Her responses under oath to the Judicial Watch group were provided by her lawyer, David Kendall.

As WikiLeaks continues to publish emails belonging to Clinton campaign chair John Podesta, US officials told CNN that there is growing evidence that Russia is using the organization as a delivery vehicle for the messages and other stolen information.

The methods of the disclosures "suggest Moscow is at least providing the information or is possibly directly responsible for the leaks," one US official said.

He also said there will be no joint military exercises with the US "next year" in a marked change from earlier statements where he insisted this year's drills would the last ever between the longtime allies.

US-Russia relations have deteriorated sharply amid a barrage of accusations and disagreements, raising the stakes on issues ranging from the countries' competing military operations in Syria, disputes over Eastern European independence and escalating cyber breaches.

"This is a conflict, there should be no doubt," said Matthew Rojansky, director of the Kennan Institute at the Wilson Center, on the US-Russia confrontation.

Washington broke off all negotiations with Moscow nine days ago amid extreme tension over failure to secure a truce.

But Russia's Foreign Minister Sergei Lavrov will now meet his US counterpart John Kerry and other key regional powers in Switzerland on Saturday.

The announcement comes after two days of renewed air strikes on Aleppo, killing at least 75 people.

The US State Department said Mr Kerry would discuss a "multilateral approach" to ending the crisis, "including a sustained cessation of violence and the resumption of humanitarian aid deliveries."