Hundreds of people, protesting the State Supreme Court’s decision to uphold a ban on same-sex marriage, have formed a human blockade at Van Ness Avenue and Grove Street, shutting down traffic and causing disruptions on Muni bus lines.

A large crowd—both for and against same-sex marriage—began gathering outside of the state courthouse on McAllister Street near the City Civic Plaza early this morning to await the court’s decision, which was announced just after 10 a.m.