BEIRUT — The Syrian opposition said Tuesday that Lebanese Hezbollah leaders should be put on trial for fighting on the government's side in the Syrian civil war.
The surge in Hezbollah involvement has coincided with a turn in the tide of the fighting in favor of President Bashar Assad's forces and may be a factor in it.
Also Tuesday, a United Nations delegation tasked with investigating the use of chemical weapons landed in Lebanon on its way for its first trip to Syria.
Hezbollah's active support of Assad's forces has fanned the flames of sectarian tensions in the region. The Syrian conflict, now in its third year, is increasingly being fought along sectarian lines, pitting Sunni against Shiite Muslims, spilling over into Lebanon.
The overwhelmingly Sunni rebels fighting to topple Assad see Hezbollah's involvement as a declaration of war.
"We call for Hezbollah leaders to be put on trial for the terrorist crimes they committed on Syrian territory," a statement issued by the Western-backed Syrian National Coalition, Syria's main opposition group, said Tuesday.
The European Union placed Hezbollah's military wing on its terror list Monday after diplomatic pressure from the U.S. and Israel.
Some European countries pushed for EU action citing a terrorist attack in Bulgaria's Black Sea resort of Burgas last year that killed five Israeli tourists and a Bulgarian. Hezbollah's military wing was accused of involvement, an allegation it denied.