Thousands of people flooded Red Square in Moscow on Tuesday to take part in an International Workers' Day procession. City Mayor Sergei Sobyanin also participated in the gathering. People, including members of different labour unions marched through the square holding banners reading 'Peace, labor, May'; 'Unity, solidarity and labour are guarantees of successful development'; 'Salary... Еще, legitimacy, employment!'; 'Respected labour-safe labour', while waving Russian flags and holding balloons. International Workers' Day, or May Day, is marked around the world on May 1 with strikes, protests, commemorations and celebrations.