Turkish police fired tear gas and water cannons against demonstrators across Turkey, as thousands of people marched around the world to mark International Workers Day, also known as May Day.
In Istanbul, Turkey, police clashed with protesters attempting to reach Taksim Square, the usual site of May Day rallies. One year ago, the massive May Day demonstrations there grew into a huge anti-government movement. At least 50 people were injured and around 140 detained in Istanbul and the capital, Ankara.
In other May Day commemorations, Russian workers marched on Moscow's Red Square in a patriotic display. Marchers held signs reading "I'm proud of my country" and "We believe our president." The parade on Red Square was the first May Day demonstration there since the fall of the Soviet Union in 1991.
Rallies also took place across Asia. Thousands of workers and activists took to the streets in Manila to demand wage increases amid rising living costs.
In Cambodia, garment factory workers demanding higher wages and better working conditions rallied in Phnom Penh.
Thousands also marched in the Cuban capital, Havana to mark the country's Communist revolution.
Photo Gallery: May Day Rallies Worldwide