Large crowds have gathered in Istanbul and other cities after calls by Turkish authorities to defend democracy after the failed military coup.
Less than 24 hours earlier thousands turned out to help rebuff the plot.
President Erdogan wants the extradition of US-based cleric Fethullah Gulen over the plot.
But Gulen rejects any suggestion of links to what happened.
Nearly 3,000 soldiers have been detained and some 2,700 judges sacked as the government re-asserts power.