Protester wore mask of hero of the popular Hollywood movie "V for Vendetta"
It also said that protests were due to be held in Barcelona, Valencia and Seville and three other Spanish cities.
Protesters held banners reading "Free Julian Assange" and "Truth Now," and shouted slogans "freedom of speech" and "free Assange"
Demonstration are also being planned at places like Amsterdam, Colombia, Argentina, Mexico, Peru, and Sao Paulo, Brazil, says the spanish site.
Read more at: http://www.ndtv.com/article/world/madrid-protests-against-assange-arrest-72085?cp