Four people were formally arrested as part of an investigation into protests against President Tayyip Erdogan’s appointment of a rector at one of the country’s top universities, an Istanbul prosecutor’s office said on Sunday. The protests began last month over Erdogan’s appointment of Melih Bulu, an academic and former political candidate, as rector of Istanbul’s Bogazici University. Students and faculty say the process was undemocratic. Istanbul Anadolu prosecutor’s office said four people were jailed pending trial over protests at Istanbul’s Kadikoy district. They were variously charged with crimes including damaging public property and terrorism propaganda. Two others were placed under house arrest, it said.