Heavy fighting has been continuing in Libya between government and rebel forces, who are still battling for the oil town of Brega. At one point, both sides simultaneously claimed control of the town. A UN envoy has arrived in the country, asking for an end to the fighting, and immediate humanitarian access. In the west, government forces have moved into the rebel-held town of Zuwara, and have started shelling the much bigger city of Misrata. But the focus has also moved east to Ajdabiya, the last town before the rebel base in Benghazi. It seems rebel fighters have been hiding inside the oil installation in Brega in the daytime, in the belief that the government does not want to shell the facility, says the BBC's Jon Leyne in Benghazi. Source: BBC