Lebanese troops have arrested a Syrian soldier for illegally crossing into Lebanese territory, security officials said Saturday. The incident occurred in the same area where clashes earlier this month between Lebanese forces and Syrian-backed Palestinian guerillas saw a Lebanese conscript killed. Tension has increased along the Lebanese-Syrian border since Syria withdrew its troops from Lebanon in April 2005, ending a 29-year military presence, amid the crisis that followed last year's assassination of former Lebanese Prime Minister Rafik Hariri. A UN probe has implicated top Syrian security officials in Hariri's assassination. Syria has denied any involvement in the killing.