Deadly explosion in Libyan port city strikes mosque during Friday prayers, weeks after 33 died in a double auto bombing.
On January 23, two vehicle bombs exploded outside a mosque, killing at least 34 people, including children, and injuring 90 others.
The UN is now trying to negotiate an end to the current political turmoil by agreeing parliamentary and presidential elections later this year, but there is deep skepticism over whether they will take place.
"A vehicle bomb exploded near the mosque of Abu Huraia", wrote the website Al Wasat, quoting the television 'Libya Roha Al Watan". Local media news reports put the number of those injured at 129.
No group immediately claimed responsibility for the attack.
The United Nations Support Mission in Libya (UNSMIL) was quick to condemn the attack, calling reports of civilian casualties "deeply disturbing".
"This heinous act should not provide a justification for revenge attacks".
Benghazi, which has been controlled by the Libyan Army after terrorist groups were eliminated from the city in late 2017, is witnessing an escalation of bombings particularly on mosques.
Senior security officials were among the casualties.
Benghazi has seen often seen fighting between forces loyal to the self-styled Libyan National Army and Islamist militia opponents.
The LNA claimed victory in Benghazi in July of previous year, but sporadic clashes dragged on until December when it took control of its rivals' final holdout.
The toll was one of the highest from a single attack since Libya slid into turmoil after the uprising that toppled Muammar Gaddafi in 2011. The country has been since split between rival governments and militias.