Emir Balat and Ibrahim Kayumi have a lot in common: They're both teenagers. They're both first-generation Americans. Both live on tree-lined streets in the affluent suburbs north of Philadelphia.

For all their similarities, however, authorities say the only known link between the pair is what they did together last Saturday: attempt what investigators describe as an ISIS-inspired attack by throwing explosive devices at a protest outside New York City Mayor Zohran Mamdani’s residence.