Russia said on Monday it had arrested a German woman found with a home-made bomb in her backpack in what it alleged was a Ukrainian-hatched plot to blow up a security services facility in the south. Russia has arrested dozens of people throughout the four-year war, mostly its own citizens, on allegations of working for Ukraine to carry out sabotage attacks. There has been a string of high-profile arrests of Western citizens since Moscow ordered its troops into Ukraine – typically on espionage...