Libyan rebels on Saturday said they had launched a push to capture the coastal oil town of Brega, but were advancing slowly because Muammar Gaddafi's forces had sown minefields across its approaches.
"There's a big movement on all fronts around Brega. We are attacking from three sides," said spokesman Mohammad Zawawi.
Fighting on the eastern front of the civil war, which has moved backwards and forwards for the past months, has been bogged down for weeks on the fringes of Brega, about 750 km (465 miles) east of Tripoli.
Zawawi said rebel forces were in sight of a residential area of Brega and believed they could take the town, which is south of the rebel capital Benghazi on the eastern side of the Gulf of Sirte.