<p>THESSALONIKI, Greece — Extensive clashes broke out between police and protesters Thursday in Greece’s second-largest city, Thessaloniki, after authorities ended an occupation by students and other demonstrators at the city’s main university building. </p>
<p>Protesters threw petrol bombs at police after street clashes erupted near the city center. Police responded with tear gas and made multiple arrests. No injuries were reported.</p>
<p>The occupation, which had lasted for about three weeks, was to protest a decision by the center-right government to start police patrols of university campuses.</p>
<p>Despite lockdown restrictions, dozens of protest marches have taken place in Greek cities over the past month against the prospect of police gaining access to campuses. </p>
