Police in Athens have fired tear gas to disperse demonstrators hurling petrol bombs and stones as a 24-hour general strike grips Greece.

The violence erupted during a rally by more than 30,000 angry workers near the Greek parliament. They object to the government's far-reaching budget cuts.

The strike paralysed public transport. More than 100 flights were cancelled.

Many schools are closed and hospitals have reduced services. Small businesses have joined in, closing many shops.

It is Greece's first major labour protest this year, as the government sticks to austerity cuts demanded under the terms of the country's international bail-out.

The Socialist government of Prime Minister George Papandreou is cutting spending and raising taxes to reduce its debt mountain.

In May last year Greece secured a 110bn-euro (£93bn; $150bn) bail-out from the European Union and International Monetary Fund, BBC reported.