Turkish F-16 fighters hit 17 PKK positions in northern Iraq, destroying shelters used by the militant group, the army said on its website, listing three locations.
More than 150 soldiers and police have been killed in attacks since July blamed on the PKK.
The curfew came after the military said two Turkish soldiers had been shot dead Thursday by Kurdish militants in Silvan as they left for work.
At the beginning of the rally, a so-called anthem titled “Hey Enemy” was allegedly played, which includes phrases praising the PKK terrorist organization; the crowd at the rally also reportedly sang the anthem along with her.
The government, for its part, claims to have killed more than a thousand rebels – figures that have been treated with scepticism in the independent media.
HDP district officials have been detained in previous police raids in the predominantly Kurdish southeast.
About 40,000 people have been killed since the PKK launched an insurgency for greater Kurdish autonomy in the 1980s.
Turkey’s crackdown on the PKK began in July after a 2 1/2-year-old ceasefire collapsed and has escalated ahead of a snap national election on November 1.
According to sources, counter-terrorism teams, backed up by helicopters, launched a massive operation against the outlawed Kurdish Workers’ Party (PKK) in 28 districts of the metropolis, Xinhua news agency reported.
Among those detained on Friday were district officials of the Peoples Democratic Party (HDP), a left-wing grouping accused of having links with the hardline PKK, Hurriyet newspaper said.