The United States is calling for North Korea to stop its "destabilizing actions" and follow through on its international obligations.

"We call on [North Korea] to refrain from provocative, destabilizing actions and rhetoric, and to make the strategic choice to fulfill its international obligations and commitments and return to serious talks," Pentagon spokesman Gary Ross said, according to CNN.

"North Korea's unlawful weapons programs represent a clear, grave threat to U.S. national security."

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On Sunday, North Korea said its military could sink a U.S. aircraft carrier that President Trump is sending to the region "with a single strike."

"Our revolutionary forces are combat-ready to sink a U.S. nuclear powered aircraft carrier with a single strike," North Korea's ruling Workers' Party newspaper said in a commentary, according to Reuters.

The USS Carl Vinson and Japanese navy ships are currently conducting exercises in the Philippine Sea.

Vice President Pence on Saturday said the aircraft carrier would arrive in the region "within days."

The developments come amid heightened tensions in the region.

President Trump last week put new pressure on China to rein in North Korea.

"China is very much the economic lifeline to North Korea so, while nothing is easy, if they want to solve the North Korean problem, they will," the president tweeted last week.