One of the main trade union groups in Turkey is to hold a two-day strike on Tuesday and Wednesday, after four days of clashes between the police and anti-government protesters.
The strike by the Confederation of Public Workers' Unions is likely to affect schools, universities and public offices throughout the country.
The union has strongly condemned the government's use of force against the demonstrators, who are calling for the resignation of Prime Minister Recep Tayyip Erdogan.
The confederation has 240,000 members in 11 unions.
The prime minister, who went ahead with despite facing the biggest challenge against his decade-long rule,
Mr Erdogan vowed on Monday to "stand firm" against the protests.
During an official visit to Morocco, he rejected talk of a "Turkish Spring" uprising and stressed that he was democratically elected.
"Was there a multi-party system in the Arab Spring countries?" he asked in televised comments.