WELLINGTON, New Zealand—Police on Thursday arrested dozens of protesters who were camped out on the grounds of New Zealand’s Parliament on the third day of a convoy protest against coronavirus mandates. The arrests came after Parliament Speaker Trevor Mallard took the rare step of closing the grounds. Police called in more than 100 extra officers from other parts of the country. Still, police seemed prepared to wait it out as officers formed a line and ordered people to leave but only very slowly advanced on them. By evening, police had arrested more than 120 people and charged many of them with trespassing or obstruction. Police wore protective vests but didn’t don riot gear or carry guns. Some protesters were readying to hunker down for a third night. Police said they had told everybody on the grounds they were trespassing. “Police have appealed repeatedly to protestors to leave the grounds and …