South Korean officials are stepping up their demands for answers after leaked classified US intelligence documents were reported to reveal spying on key allies by Washington. While the US government has denied the accusations, South Korean lawmakers have expressed their “strong regret” over the leak, and the country is calling for “appropriate measures” to be taken. The incident has strained diplomatic ties between the two countries and raised questions about the US’s relationship with its allies. The South Korean government has launched an investigation into the leak, and officials are vowing to get to the bottom of what happened. Meanwhile, the US is seeking to mend ties with its allies in the wake of the scandal.