Greece's two largest public and private sector unions began a 24-hour nationwide walkout on Wednesday to protest against austerity measures that foresee thousands of layoffs, dpa reported. Workers called the strike to protest the government's plan to fire at least 11,000 public servants this year. Nearly 4,000 state workers have already lost their job. The walkout caused all public services and schools to remain shut across the country. Dock workers decided to stay at home, leaving tourists stranded at islands across the country as ferries remained docked at ports. Trains were also left idle at stations across the country. Doctors and nurses at state hospitals also took part in the walkout and pharmacies remained closed. Recession-hit Greece has a record unemployment level of 28 per cent.