SAN FRANCISCO: Demonstrators seeking a ceasefire in Gaza blocked bridges on both sides of the US on Thursday, including a major span into San Francisco during a global trade summit involving President Joseph Biden and other world leaders. Eighty protesters were arrested on the San Francisco-Oakland Bay Bridge and 29 vehicles were towed after demonstrators blocked all lanes on the upper deck, with some drivers tossing their keys into the bay. One person was booked into county jail but the others were cited and released, the San Francisco’s Emergency Operations Center said in an email. Traffic was snarled for hours after more than 200 demonstrators demanded that Biden, in San Francisco for the Asia-Pacific Economic Cooperation leaders’ conference, call for an immediate ceasefire in the war between Israel and Hamas. In Boston, about 100 protesters stopped traffic on the bridge connecting the city to Cambridge for more than two hours during the morning rush. They chanted “ceasefire now!” and held a banner with the words “Jews say: cease-fire now” and they called on one of Massachusetts’ two senators, Democrat Elizabeth Warren, to do more to halt the hostilities. On the West Coast, Aisha Nizar, of the Palestinian Youth Movement, said in a statement that President Biden was “hosting cocktail parties in San Francisco” while thousands of people were being killed in Gaza. Protesters unfurled huge banners and some of them lay on the ground with white sheets draped over their bodies as part of a “die-in.” California Highway Patrol division chief Ezery Beauchamp called the Bay Area protest highly coordinated. He said the patrol supports free speech rights but not a traffic shutdown that could prevent emergency vehicles from crossing. “This is the wrong way to do it,” he said. “This is 100 percent wrong, it’s unacceptable and it’s illegal.” Demonstrations over the war are becoming more disruptive across the US Protesters calling for a ceasefire clashed with police Wednesday outside Democratic National Committee headquarters in Washington, D.C., where Democratic representatives and candidates were inside for a reception. The protests came as Israeli forces dropped leaflets warning Palestinians to flee parts of southern Gaza, residents said Thursday, signaling a possible expansion of the Israeli offensive following Hamas-led attacks in Israel on Oct. 7.