ROUGH CUT (NO REPORTER NARRATION).
STORY: The opposition in Bahrain called for a mass weekly demonstration on Friday and dozens of anti-government protesters marched on the Budaiya highway near Abu Saiba, west of the capital Manama.
The march was initially peaceful, but later in the day a small group of protesters blocked the road with debris, set rubbish bins on fire and attacked riot police monitoring the march.
On Thursday, a senior Bahraini opposition politician was temporarily freed by the court trying him on charges that include inciting terrorism.
Khalil al-Marzouq, a former parliament member, was detained in September by police investigating his alleged promotion of terrorism.
The arrest angered his Shi'ite Islamist al-Wefaq party, Bahrain's largest opposition group.
The group called for protests on Friday.
Bahrain has seen similar protests, rallies and clashes since the beginning of February, 2011.
Talks between the government and its opponents began in February, but have failed to resolve the political crisis, with the two sides still mistrustful and apparently far apart on the opposition's main demand for an elected government.
Protests in Bahrain (0:52)
Oct. 25 - Protesters fill the streets in Bahran as part of a pro-democracy march called by Bahrain's largest opposition group. Rough Cut (no reporter narration). ( Transcript )