Motaz Agouri, an official at Benghazi security directorate's media office, said the explosion took place during Friday prayers inside the Saad Ibn Ibada mosque in Benghazi's busy Berka district.
An explosion hit a mosque in the Libyan city Benghazi on Friday, killing a worshipper and injuring 55 others, authorities said.
"A auto bomb exploded near the mosque of Abu Huraia", wrote the website Al Wasat, quoting the television 'Libya Roha Al Watan".
He said according to preliminary investigations, the bombing was carried out remotely.
It would be recalled that a few weeks ago, at least 33 people were killed in a double auto bombing in Benghazi.
Later, the United Nations Support Mission in Libya condemned the attack in a statement.
"Direct or indiscriminate attacks against civilians are prohibited under worldwide humanitarian law and constitute war crimes", UNSMIL said in a post on Twitter.
Blast Hits Mosque in Benghazi, Libya, Casualties Reported (PHOTO)
The LNA was battling Islamists, including some linked to Islamic State and Al Qaeda, as well as other opponents until late previous year in the Mediterranean port city.
Haftar does not recognize the UN-backed government based in the western capital Tripoli.
Libya has been wracked by violence and divisions since dictator Moamer Kadhafi was toppled and killed in a 2011 NATO-backed uprising.
The UN has been trying to mediate for years, hoping elections could help stabilise Libya.
It has since imposed strict military control on the city and other parts of eastern Libya under its control.
The North African nation has had competing governments aligned with rival military factions based in Tripoli and the east since 2014.
11 minute scoring drought dooms Illini in loss to Ohio State
ASSOCIATED PRESS Penn State's Mark Hall, top, wrestles Ohio State's Bo Jordan at 174 pounds Saturday at Penn State's Rec Hall. He attacked Tomasello with aggressive shots and took an 8-7 lead after a first period that saw him score three takedowns.