Forces of Libyan commander Khalifa Haftar attacked opposition targets in the eastern city of Derna on Tuesday using aircraft and artillery, taking a wheat silo and villages on the outskirts, military officials said according to reuters.com.
It was the first major operation since Haftar announced last week that he would seize the last stronghold of opposition to his Libyan National Army (LNA) in the east of the country.
The LNA has surrounded the city, on the coastal highway between Benghazi and Egypt, and has long threatened to begin ground operations there. Its campaign had previously been limited to occasional air strikes and bombardments.
The United Nations is leading efforts to stabilize Libya and prepare it for elections before the end of the year.
Egypt, which backs the LNA, has several times carried out air strikes in Derna on what it said were training camps sending militants into Egypt.
The troops advanced to villages some 4 kms (two and a half miles) from the city, LNA sources said.
Sabra did not have casualty figures but websites close to the DMSC said five people were killed in air strikes.