Miners block a motorway making a barricade with burning tires in Campomanes, Oviedo, Spain, Tuesday, June 12, 2012. Strikes, road blockades, and mine sit-ins continue as 8,000 mineworkers at over 40 coal mines in northern Spain continue their protests against government action to cut coal subsidies. (AP Photo/Emilio Morenatti)

Spain strikes, protests against austerity [VIDEO]

Burning tires are visible at a protest in Barcelona as workers around the European Union seek to unite in a string of strikes and demonstrations. Clashes with police erupted overnight in Madrid.