Thousands of trade union members and activists were marking May Day on Wednesday by marching through Asia's capitals and demanding better working conditions and expanding labor rights.
In addition to South Korea, rallies were held in the Philippines, Malaysia, Indonesia, Taiwan, Cambodia and Myanmar.
Other parts of the world had rallies as well.
Spain's workers marched in major cities to make their voices heard days before acting Prime Minister Pedro Sánchez starts negotiating with other parties to form a new government.
Spain's leading labor unions are pressing for Sánchez to roll back business-friendly labor and fiscal reforms that have remained in place since the previous conservative administration.
Turkish police detained May Day demonstrators who tried to march toward Istanbul's symbolic main square in defiance of a ban.
Turkey declared Taksim Square off-limits to May Day celebrations citing security concerns.
French protesters and police have clashed briefly in Paris as thousands of people gather for a May Day march.
Police used some tear gas to control a crowd near Paris' Montparnasse train station.
An activist group says more than 100 people have been arrested at May Day rallies across Russia, with over half of the detentions taking place in St. Petersburg.
The OVD-Info group said Wednesday that at least 68 people were detained in St. Petersburg, Russia's second-largest city, in an anti-government contingent that authorities had sanctioned as part of the main May Day demonstration.
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