Riot police have clashed with protesters in Athens during an anti-austerity protest in Syntagma square.
Police are reported to have used teargas to disperse crowds who were said to be hurling stones and petrol bombs.
The disturbance comes as EU leaders meet in Brussels in a bid to tackle the eurozone crisis.
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BA said the strikes will impact "only 1 per cent of our total scheduled flights across the three days."
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The singer, songwriter and rhythm guitarist for the British rock'n'roll band died on Christmas Eve aged 68.