Avrupa/London-Turkish authorities have arrested dozens of people protesting in the fiercest anti-government demonstrations the country has witnessed in years, with riot police firing tear gas on demonstrators in Istanbul and Ankara. Protests over the demolition of a park in the center of downtown Istanbul in favor of a shopping mall entered a fourth day, with police using tear gas, water cannons and pepper spray to try to disperse the occupiers. Turkey protests spread after violence in Istanbul over park demolition. Demonstrations against Erdogan government in several cities as riot officers use tear gas to control protesters in Istanbul