After South Korea's president and his replacement were both deposed over a failed bid to impose martial law, deepening political turmoil is threatening the country's currency and shaking confidence in its economy.

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.

The vote was the second major impeachment in two weeks after President Yoon’s ill-fated martial law bid set off turmoil. The country’s currency has plunged.