In pictures: Labour Day around the world

Riot police stand guard near Taksim Square to prevent protesters from defing a ban to celebrate May Day in Istanbul.
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Indian workers and members of various trade unions dressed in red take part in a rally on International Workers' Day in Bangalore

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People hold red balloons during a May Day rally organised by the Ukrainian left-wing parties and the trade unions in Kiev on May 1, 2017.

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Members of the Greek communist labour union (PAME) gesture as they demonstrate in central Athens during the May Day celebrations on May 1, 2017

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Riot police clash with protesters attempting to defy a ban and march on Taksim Square to celebrate May Day in Istanbul, on May 1, 2017.

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Visitors pose for photos in Tiananmen Square on the May Day holiday in Beijing on May 1, 2017.

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An Indian labourer works at a brick factory near Allahabad on April 30, 2017, on the eve of International Labour Day.

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Pakistani labourer work at an iron factory on the eve of International Workers' Day in Lahore on April 29, 2017.

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A Sri Lankan porter carries goods at the main market in Colombo on April 30, 2017, on the eve of International Labour Day or May Day.

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A Pakistani labourer makes clay dishes at a factory in Karachi on April 30, 2017, ahead of International Labour day.