Libyan forces in Benghazi lost four men and had 10 wounded so far in December, five months after declaring victory in a campaign to control the eastern city, a medical source said.
Three of the dead from the Libyan National Army (LNA) were killed by snipers and one by a landmine as it faces resistance from fighters in the district of Khreibish.
There have been daily clashes in the area and occasional air strikes.
LNA commander Khalifa Haftar declared victory in a three-year military campaign against an array of Islamist militants and other fighters in Benghazi in early July.
The fighting is part of a broader conflict that developed following the 2011 fall of strongman Muammar Gaddafi. Haftar opposes the UN-backed government based in Tripoli as he gradually strengthens his position.