ISTANBUL — The mayors of three major cities in southern Turkey were arrested Saturday, state-run media reported, joining a growing list of opposition figures detained since the mayor of Istanbul was imprisoned in March.

As Turkish leader Recep Tayyip Erdogan’s crackdown on critics, dissenters, and political opponents is causing massive outrage, there are demands for snap elections in the country as more and more people are rejecting his authoritarian rule that is now in its 23rd year.

Turkish state-run media says the mayors of two major cities in southern Turkey have been arrested, joining a growing list of opposition figures detained since the mayor of Istanbul was imprisoned in M