A three-week bank strike in Greece will this Friday expand into a 24-hour general walkout, as workers protest at planned pension and labour reforms.
Bank workers are already on strike
The government says it will push ahead with the reforms, which will include a pensions overhaul and the introduction of short-term civil service contracts.
The unions say pension payouts will drop by half, the retirement age will rise and jobs will be lost.
The dispute is expected to affect flights in and out of the country.
Over the last three weeks, long queues have formed at the country's banks.
Friday's general strike is being organised by the main Greek union - the General Confederation for Greek Workers (GSEE) - in association with the largest bank union, OTOE.
The 15-month-old conservative government of Prime Minister Costas Caramanlis said it would continue with its reform plans, despite the planned 24-hour walkout.
People have had to queue for cash machines
Draft legislation to reform bank workers' pensions is already being reviewed in the Greek parliament.
The government plans to introduce changes to public-sector contracts and to remove employees' permanent-job status in the giant public sector.
"The government exhausted all limits of dialogue and we heard the views of bankers and the employees," said Finance Minister Giorgos Alogoskoufis.
"We drafted legislation that is balanced - without adopting the views expressed by either side."
OTOE leader Dimitris Tsoukalas said his members were "determined to continue our protest, no matter what".
Greece last saw a 24-hour general strike back in March amid fears of rising unemployment and inflation.