An explosion took place at a mosque in the eastern Libyan city of Benghazi on Friday, residents said.
An explosion hit a mosque in the Libyan city Benghazi on Friday, killing a worshipper and injuring 55 others, authorities said.
Agouri said the bombs were planted in separate rooms inside the mosque.
The devices, placed inside bags, appear to have been activated remotely using a mobile phone, a military source said.
"Direct or indiscriminate attacks against civilians are prohibited under worldwide humanitarian law and constitute war crimes", the mission added, calling for "prompt, impartial investigations to bring perpetrators to justice".
It would be recalled that a few weeks ago, at least 33 people were killed in a double vehicle bombing in Benghazi.
"This heinous act should not provide a justification for revenge attacks".
Jihadists and the forces of general Khalifa Haftar have been fighting to gain control of the city for over three years before Haftar announced that his troops has retaken it last July.
Libya descended into chaos after the 2011 uprising that toppled and killed ruler Moammar Gadhafi. The LNA has been battling Islamists, including some linked to Daesh and al-Qaeda.
The summary executions are believed to be carried out by Mahmoud al-Werfalli, a special forces commander for the LNA. Security in many parts of Libya is poor. He does not support the government in the western capital Tripoli, back by the United Nations.
The North African nation has had competing governments aligned with rival military factions based in Tripoli and the east since 2014.