Libyan government forces have seized a tanker that had loaded crude at a port under the control of rebels who plan to sell oil independently of the Tripoli government.
The North Korea-flagged shipped was being escorted to western Libya, a spokesman for the state-owned National Oil Corp Mohammed El-Harari told Reuters, confirming Libyan media reports.
Another Libyan official, Abdelwahab al-Qaim told Reuters: "The ship has been seized by government forces. There are no damages to the ship."
A rebel spokesman had earlier denied they had lost control of the ship.
More top news
Rupert Murdoch faces a fresh setback in his bid to take full control of Sky through 21st Century Fox.
Kyle Edmund continued his remarkable Australian Open run by beating Grigor Dimitrov to reach the semi-final.
Nearly 1,500 people were evacuated from a central London nightclub, hotel and Charing Cross railway station after a major gas leak.