A search and rescue operation is underway after two firefighting helicopters collided while tackling a wildfire near the Greek capital Athens. (Subscribe: https://bit.ly/C4_News_Subscribe)
Officials said one Danish and one Greek national had been killed. Efforts to battle the growing blaze have been hampered by gale force winds - while further west, thousands of firefighters are still trying to contain large scale wildfires in southern France.
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