New York Police Commissioner Jessica S. Tisch said investigators found that one of the smoking devices thrown during the confrontation was an improvised explosive device (IED) that “could have caused serious injury or death.” Two people — Emir Balat, 18, and Ibrahim Nikk, 19 — were arrested in connection with the devices, police said. Authorities are still determining the charges. Four other individuals were also arrested after scuffles broke out during the protest. The demonstration had been organised by right-wing activist Jake Lang, who protested near the mayor’s residence. Police said tensions escalated as more than 100 counterprotesters gathered at...