Libyan rebels say forces loyal to Libyan leader Moammar Gadhafi have fired rockets at opposition fighters near the border with Tunisia. Reuters news agency quoting witnesses today said Libyan rockets crossed the border into Tunisia. Libya fired rockets into Tunisia on May 17 and the Tunisian government threatened to report it to the UN Security Council for ememy actions. Libyan forces also have engaged in periodic short skirmishes with Tunisian troops after Libya's internal fighting spread across the border. Meanwhile, Libyan rebels have advanced from the western port of Misrata towards the capital, Tripoli breaking a government siege as fighters across the country renewed the revolt against leader Moammar Gadhafi. Several rebel units have pushed the frontlines west from Misrata to the outskirts of Zlitan, a neighbouring town held by Gadhafi's forces.