Greek police clashed with protesters in the vicinities of National Technical University of Athens as thousands attended protests marking the International Workers' Day (May Day) on Tuesday. Protesters threw rocks at police, who in turn responded with teargas. Tensions emerged following the demonstration in the centre of the Greek capital, where thousands marched against unemployment and... Еще austerity measures. Public and private sector unions, anarchists, students, and members of parliament, including former Greek Finance Minister Yanis Varoufakis, had joined the May 1 rally earlier in the day. Labour Day is marked around the world with strikes, protests, commemorations and celebrations.