More than 100,000 jubilant workers gathered in Istanbul's Taksim Square in the first celebrations at the site since dozens of people died there in a May 1 gathering more than three decades ago.

The demonstrations in Istanbul, which sits on both European and Asian continents, marked a special victory for the Turkish unions, which had been denied access to the Taksim Square since 1977, when 34 people died after shooting triggered a stampede. The culprits were never found and workers on Saturday demanded an inquiry into the deaths of the demonstrators.

Most of the annual May Day marches were peaceful, but in the Chinese territory of Macau police used water cannons and pepper spray against rowdy protesters who tried to break away from the approved route. Hong Kong radio RTHK reported at least eight people injured, including a photographer.

German police said 17 officers were injured following clashes with demonstrators who threw paving stones and set garbage cans ablaze in the northern port city of Hamburg.

At least nine demonstrators were detained after the confrontations with police on the eve of Saturday's May Day holiday, the German news agency ddp reported.

Berlin police said Friday night celebrations in the capital remained peaceful. Several hundred officers were patrolling the streets Saturday, ahead of a planned neo-Nazi march and other demonstrations.

Rallies and other events marking May Day in Berlin and Hamburg have turned violent in recent years leading police to cordon off hotspot areas and ban bottles.

In Manila, President Gloria Macapagal Arroyo announced she had ordered the labor secretary to speed up negotiations between unions and employers on a 75-peso ($1.67) increase in daily minimum wage.

In Indonesia's capital, thousands of workers marched on the presidential palace, shouting: “Workers unite! No more layoffs!.” Rally organizer Bayu Ajie said a free trade agreement with China had cost jobs, decreased wages and encouraged corruption. President Susilo Bambang Yudhoyono promised to create safer working conditions and improve job prospects if the workers maintained political and economic stability.

In Seoul, South Korea, Tokyo and Taiwan, thousands marched for better working conditions and permanent jobs. Jeong Ho-hee, spokesman of the Korean Confederation of Trade Union, vowed to fight against long working hours and high death rate related to industrial accidents.

In the Malaysian capital, Kuala Lumpur, several hundred workers protested a proposed 4 percent goods and services tax while about 1,000 protesters, including janitors, construction workers and bus drivers, demanded the government in Hong Kong to introduce a minimum wage of 33 Hong Kong dollars ($4.30).

This freewheeling capitalist Chinese enclave is one of the world's wealthiest cities, but critics say its wealth is concentrated in the hands of a few.

“A lunch box at a fast-food restaurant costs about HK$30 ($4). It's an insult if you can't afford a lunch box after working for an hour,” pro-democracy legislator Leung Yiu-chung said on the sidelines of Saturday's protests.