Ukraine has arrested Andriy Yermak, a former top aide to President Zelensky, on money-laundering charges as part of an widening corruption investigation.

Ukrainian ⁠President Volodymyr Zelensky’s former right-hand man was taken into custody on Thursday on money-laundering charges, part of a fight against corruption that is fuelling wartime political tensions. Investigators on Monday had named Andriy Yermak as an official suspect in a sprawling, multi-episode case that has gripped Ukraine for months and stoked anger among a war-battered population at high-level corruption. His arrest represents the deepest authorities have dug into the president’s...