Hezbollah Resistance movement has blamed the Zionist Israeli reime and vowed to retaliate over the explosions that killed 12 people, including two children, and wounded up to 2,800 others.
In a statement, the United Nations High Commissioner for Human Rights Volker Turk described the blasts as "shocking", and said their impact on civilians was "unacceptable".
"The fear and terror unleashed is profound."
The UN rights chief stressed that the "simultaneous targeting of thousands of individuals, whether civilians or members of armed groups, without knowledge as to who was in possession of the targeted devices, their location and their surroundings at the time of the attack, violates international human rights law and, to the extent applicable, international humanitarian law".
"There must be an independent, thorough and transparent investigation as to the circumstances of these mass explosions," he said.
MNA