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 opposition-controlled National Assembly has voted to impeach the country’s acting leader Han Duck-soo. The assembly approved the impeachment motion in a 192-0 vote. Han’s impeachment further deepens South Korea’s political crisis and damages its international image.

South Korea’s parliament impeached Acting President Han Duck-soo, dealing another blow to a government already reeling after President Yoon Suk Yeol’s suspension less than two weeks ago for his brief martial law decree.