More than 200 demonstrators marched through Harvard Yard Tuesday afternoon and delivered a petition signed by more than 4,000 student workers to Massachusetts Hall, hours after Harvard’s graduate students began their second strike of the year.

Members of the Harvard Graduate Student Union-United Auto Workers rallied outside the Science Center before marching through the Yard, banging on plastic buckets and shouting slogans. Demonstrators gathered on the steps of Widener Library before circling Massachusetts Hall, where union leaders delivered the petition to a University official.

HGSU president Denish K. Jaswal and vice president Evan R. Lemire read the petition aloud before handing it over. Addressed to Harvard President Alan M. Garber ’76 and Provost John F. Manning ’82, the letter pressed University administrators to meet the union’s demands.