Russia arrested four people Wednesday, accusing them of sending money to Ukrainian armed forces and planning to join Kyiv’s ranks, and separately placed an exiled feminist on its wanted list. The FSB detained two 19-year-olds in the city of Saransk in the republic of Mordovia, saying they had been planning to fight for Ukraine. Russian news agencies quoted the FSB as saying that the two had “planned to go to Ukraine through the territory of a third country in order to join combat operations against the Russian army.” A criminal case on “participating in a terrorist organization” was opened aga…