BEIRUT – Syrian security forces opened fire Wednesday on anti-regime demonstrators surrounding the cars of a U.N. team meant to monitor a shaky cease-fire, sending the observers speeding off and protesters dashing for cover, according to activists and amateur videos.

The fresh violence in a suburb of Damascus, the Syrian capital, provided the first public glimpse of the work of the small team struggling to reinforce the international community’s stumbling efforts to end 13 months of deadly conflict in Syria.

The shooting, which wounded at least eight people, could also complicate the deployment of a larger U.N. mission to help a cease-fire take hold between President Bashar Assad’s forces and opposition fighters.

The difficulties of the team’s mission was clear Wednesday during its visit to the suburb of Arbeen, just northeast of Damascus. The plan has been troubled since it went into effect last Thursday.