A deepening political crisis in South Korea has not diminished the military readiness of 28,500 troops stationed in the Asian state, a U.S. official said on Friday, but Washington is closely monitoring the situation.

South Korea's acting President Han Duck-soo has been impeached by the opposition party controlling the National Assembly. This comes weeks after President Yoon Suk Yeol's imposed martial law, leading to his own impeachment.

South Korea’s parliament voted to impeach Prime Minister and acting President Han Duck-soo, less than two weeks after parliament stripped President Yoon Suk Yeol of his powers over his short-lived martial law order that plunged the country into political disarray.