U.S.'s Yellen says any N. Korean nuclear test would be very provocative

FILE PHOTO: U.S. Treasury Secretary Janet Yellen testifies during a House Ways and Means Committee hearing on President Biden's proposed 2023 U.S. budget, on Capitol Hill in Washington, U.S., June 8, 2022. REUTERS/Jonathan Ernst/File Photo

SEOUL (Reuters) - The United States has further sanctions it could adopt against North Korea, U.S. Treasury Secretary Janet Yellen told Reuters on Monday, adding that any nuclear test by Pyongyang would be seen as very provocative.

Concern is growing that North Korea could be preparing to test a nuclear weapon for the first time since 2017 following a record number of missile tests this year, including that of its largest intercontinental ballistic missile.