Thousands gathered on Thursday at a cemetery in Diyarbakir for the funeral of three people killed during the week's street violence.
Fresh fighting erupted in the city after the funeral, with some mourners pelting police with stones, prompting volleys of tear gas and warning shots from them.
At least 250 people have been injured in the protests so far - more than half of them police officers, Turkish officials say.
In nearby Batman, an estimated 2,000 people were taking part in a protest march when the unrest broke out.
Correspondents say these are the worst street clashes in the region for many years.
In Diyarbakir mourners held flags of the outlawed separatist Kurdistan Workers' Party (PKK), which called off a unilateral ceasefire almost two years ago.
The authorities have reinforced the number of riot police and armoured personnel carriers in the city's streets.