Anti-government protesters took to the streets of Iran Saturday after Tehran admitted that it mistakenly shot down a Ukrainian passenger jet, killing 176 people. Thousands gathered outside the gates of Amir Kabir University, near the former US embassy in Tehran, to denounce the plane crash the government blamed on human error and “US adventurism.”Ukraine International Airlines Flight 752 crashed Wednesday after takeoff from Tehran’s airport. The crash came hours after Iran fired missiles at Iraqi military bases housing US troops in retaliation for a drone strike at Baghdad airport that killed Iranian commander Qasem Soleimani. In video posted on social media, protesters chanted for Supreme Leader Ayatollah Ali Khamenei to step down and for those responsible for downing the plane to be prosecuted. “Death to the dictator,” some chanted. In one video, demonstrators chanted, “Khamenei have shame. Leave the country.” A mass vigil commemorating the victims of the doomed flight escalated into an angry demonstration following the government admission, according to Iran’s semiofficial FARS News Agency. University graduates migrating to Canada were among those who perished in the crash. FARS reported that Iranian police dispersed students who entered and blocked main roads. Their anger was fueled in large part by the nation’s armed forces claim that it targeted the passenger plane unintentionally. It attributed the crash to radar activity and fear of US action.