Four South Africans, among about 20 young men whose families said they were duped into fighting for Russia, have been repatriated, the state-owned South African Broadcasting Corp. reported.

Megan Kunz, a friend of Borrenpohl’s wearing a “Destroy American Fascism” hoodie, tried to help. But an older man in a blue flannel blocked Kunz’s path, towering over her like a self-deputized sheriff ...