Libya said on Wednesday its crude oil output had fallen again as new problems appeared at oilfields.
"Production is lower than yesterday. Today [Wednesday] it is at 600,000 barrels per day (bpd) and yesterday it was at 680,000 bpd," deputy oil minister Omar Shakmak told Reuters.
Stoppages at the ports have frozen most exports, forcing some oilfields to slow down production.
Some other production facilities have also been halted by protests, including occupation by jobless people seeking work.
Shakmak attributed the latest cut in production figure to various problems at fields including Hamada in the east, but gave no details.
"Some fields have problems and one of them is Hamada, production was 10,000 bpd and it has stopped," he said.
The Hamada oilfield is run by state oil company subsidiary Arabian Gulf Oil Company (AGOCO).