Croatia's prime minister has ordered an inquiry following arrests of several opposition activists who made plans via the social networking website Facebook.
"This is not about this or that government or party, but about freedom," Croatian PM Ivo Sanader said.
Police in Zagreb questioned a Facebook activist who had put up posters ahead of an anti-government protest planned for Friday, Croatian TV reported.
Last week a man who had set up an anti-Sanader forum was held in Dubrovnik.

source: bbc