A statement purportedly from the eastern division of the Petroleum Facilities Guards (PFG) says it rejects the recent agreement to reopen a number of closed oil terminals.

The Benghazi-based Arabian Gulf Oil Company (AGOCO) says it has been forced to close its main office after receiving threats from groups calling for strikes and protests.

The Ministry of Oil and Gas says crude is now being pumped to the Hariqa port in Tobruq north-east Libya, although no oil has yet been exported.

The rogue tanker seized by the US Navy last month has unloaded its shipment of crude oil at Zawiya, in western Libya, while most of its crew have returned to Pakistan.

The government and a pro-federalist group say they have reached an agreement to reopen the two terminals "immediately", with Ras Lanuf and Es Sider to be follow suit after further negotiations.

The Sharara and El Fil fields in south-west Libya remain closed, the oil minister says, while the pipeline from the Wafa field is also shut.

The government has ruled that the headquarters of the Petroleum Facilities Guard (PFG) will be moved to Brega, in central Libya, close to several blocked oil ports.

Russia's Tatneft, which had suspended operations since the start of the 2011 conflict, says it expects to resume work in the country later this year.

Senior figures in the group behind the closure of oil export terminals in the centre and east of the country say they have reached an agreement with the central government.

The now-jailed son of Muammar Gaddafi has said he was involved in "frequent correspondence" with Ibrahim Jadhran, the man behind the closure of key oil terminals.

A leader of the Magharba tribe, of which Ibrahim Jadhran is a member, has said there are "positive signs" that closed oil terminals will reopen soon.

Three Libyans who were on board the North Korean-flagged tanker that loaded crude from Es Sider have reportedly been freed.

A number of roadblocks caused congestion in the capital after the main roads into the city centre were blocked.

The state-controlled petrol station chain plans to move its headquarters to Benghazi, where it was originally based.

Protesters demanding the removal of the national assembly have blocked a pipeline running from the Wafa field to the Mellitah terminal.