Tibet's earthquake of magnitude 6.8 that killed 126 and damaged four water reservoirs this week highlights the risks from a hydropower building spree by Asian giants China and India in one of the world's most remote, quake-prone regions, experts say.

South Korean police has questioned the chief of the presidential security service as the two agencies clashed over attempts to detain impeached President Yoon Suk Yeol

South Korean President Yoon Suk Yeol’s security chief resigned Friday, a week after leading a team that blocked an attempt to arrest the impeached president over his short-lived imposition of martial law.

South Korea’s acting leader has accepted the resignation of the chief of the presidential security service, Park Jong-joon, as he faced police questioning over how his forces blocked law enforcement efforts to detain impeached President Yoon Suk Yeol last week.

South Korean presidential security chief Park Chong-jun plans to appear for questioning by police on Friday, a spokesperson for the security service said. Investigators seeking to arrest South Korea's impeached President Yoon Suk Yeol for possible insurrection were blocked by his security staff in a six-hour standoff last week.