ISTANBUL - Turkey's Public Workers Unions Confederation (KESK) said on Monday it would hold a "warning strike" on June 4-5 to protest at a crackdown on anti-government protests over the last four days."The state terror implemented against mass protests across the country ... has shown once again the enmity to democracy of the AKP government," said a statement from the leftist confederation KESK, which has some 240,000 members in 11 unions.