A man walks by a group of Colombian riot policemen who guard the international brigde in the Venezuelan-Colombian border zone of San Antonio where a demonstration is being held by local residents against the security measures taken by both countries on March 5, 2008. Venezuela moved 10 army battalions close to the border with Colombia Wednesday as South American diplomats sought to defuse a regional crisis triggered by Bogota's cross-border attack in Ecuador. Officials in Colombia, which has received full US backing in the dispute pitting it against the leftist governments of Ecuador and Venezuela, said they were confident negotiations would prevail over bellicosity.