GREEK riot police fired tear gas at students holed up in an Athens university yesterday, taking violent protests over the killing of a schoolboy into a fourth day.
The early morning clash took place at the Athens Polytechnic. The streets around it and nearby Athens Law School were closed because the institutions, in the Exarchia district where 15-year-old Alexis Grigoropoulos was fatally shot by police on Saturday, were occupied by students.
