A road side bomb exploded in a suburb of Damascus, as UN observers was nearby, touring the area.
The blast detonated about 150 meters away from the visiting UN peacekeeping chief Herve Ladsous and chief of the UN observers in Syria Maj. Gen. Robert Mood.
An UN observer team, numbering over 250, has failed to stop the bloodshed in Syria, with violence raging unabated in several cities across Syria.
"The city (Douma) is completely paralyzed," Ladsous said. "There is still some fighting taking place. ... It's absolutely imperative that all parties exercise restraint and don't engage into any more fighting. It serves nothing."