The U.S. has reportedly made plans to send two more aircraft carriers to the Korean Peninsula.
The U.S. has warned North Korea that the country needs to cease its nuclear tests, with President Donald Trump telling dictator Kim Jong-un that he has "got to behave," the Daily Mail reports. The warning comes amid fears that North Korea has plans to carry out its sixth nuclear test.
The U.S. has already sent the U.S.S. Carl Vinson to the peninsula, and reportedly plans to send the U.S.S. Ronald Reagan and U.S.S. Nimitz to the Sea of Japan in April.
Vice President Mike Pence left the South Korean capital of Seoul for Japan April 18, where he reportedly reassured Japanese Prime Minister Shinzo Abe that the U.S. would work with Japan and other allies in the region to find "a peaceable resolution and the denuclearization of the Korean Peninsula."
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"We are with you 100 percent," said Pence, adding that "all options are on the table."
"President Trump is determined to work closely with Japan, with South Korea, with all our allies in the region, and with China' to resolve the problem," the vice president added.
"We seek peace always as a country, as does Japan, but as you know and the United States knows, peace comes through strength," said Pence, "and we will stand strongly with Japan and strongly with our allies for a peace and security in this region."
Abe responded by stressing the importance of diplomacy.
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"It goes without saying that it is a matter of paramount importance for us to seek diplomatic efforts as well peaceable settlements of the issue," the prime minister said.
"But at the same time," Abe added, "dialogue for the sake of dialogue is valueless and it is necessary for us to exercise pressure North Korea so that it comes forward and engages in this serious dialogue."
Earlier in the week, Pence warned North Korea not the test "the strength of the armed forces of the United States in this region," according to The New York Times.
Officials reportedly expressed optimism that China will begin to help place pressure on North Korea.
"There’s a lot of economic and political pressure points that I think China can utilize," said White House press secretary Sean Spicer. "We’ve been very encouraged with the direction in which they're going."
Susan Thornton, the State Department's acting secretary for East Asian and Pacific Affairs, said that the Trump administration was seeking "a signal [from North Korea] that they realize the current status quo is not sustainable."
"Without a signal like that," Thornton said, "I think the international community is going to resolve to just ratchet up the pressure."