Armed protesters in eastern Libya traded threats with the government in a tense stand-off over the unauthorised sale of oil from a rebel-held port.
A North Korean-flagged tanker, the Morning Glory, docked on Saturday at the port of Es Sider and local daily al-Wasat said it had loaded $36 million of crude oil. Prime Minister Ali Zeidan has said the military will bomb the 37,000-tonne vessel if it tries to leave.
Officials said on Sunday that the navy and pro-government militias had dispatched boats to stop it from getting out. The rebels said any attack on the tanker would be "a declaration of war."
The escalating conflict over the country's oil wealth is a sign of mounting chaos in Libya, where the government has failed to rein in fighters who helped oust veteran ruler Muammar Gaddafi in 2011 and who now defy state authority.
The protesters, who also include former soldiers and ex-oil guards led by a former anti-Gaddafi commander, Ibrahim Jathran, have seized three eastern ports in the OPEC member country.
The Defence Ministry issued orders to the chief of staff, air force and navy to deal with the tanker. "The order authorises the use of force and puts the responsibility for any resulting damage on the ship owner," it said in a statement.
"Several navy boats have been dispatched. Now the tanker's movements are under complete control and nobody can move it," said Culture Minister Habib al-Amin, who acts as informal government spokesman. "The tanker will stay where it is."
"All efforts are being undertaken to stop and seize the tanker, if necessary by a (military) strike, if it does not follow orders," he said, adding that state prosecutors would treat the loading of the crude as smuggling.
There was no sign of any immediate military action, but Libyan news websites showed some small boats close to a tanker which they said was the Morning Glory.
Libya has been trying to rebuild its army since Gaddafi's overthrow, but analysts say it is not yet a match for battle-hardened militias that fought in the eight-month uprising that toppled him.
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