Tensions flare at U.S. universities over Gaza protests

NEW YORK — Classes at Columbia University were shifted online Monday as protests over the Israel-Hamas war heightened tensions on U.S. campuses and led to dozens of arrests at Yale University.

A large group of demonstrators has established a "Gaza Solidarity Encampment" on lawns at Columbia, with some Jewish students at the prestigious New York institution reporting intimidation and anti-Semitism amid the days-long protest.

In an open letter to the university community, Columbia's...