VIDEO: Angry scenes at farmers' protest in Brussels

Police used water cannon and pepper spray against farmers protesting in Brussels on Monday over a drop in prices that has intensified since the opening up of the milk market early this year.

Thousands of farmers have descended on the city and the European Union headquarters to demand more aid and higher prices for their milk and meat.

Outside the European Commission building, protesters responded to riot police's use of a water cannon by dumping hay on them and setting hay bales on fire.