Backed by tanks and rocket fire, Libyan rebels fighting Moammar Gadhafi's forces in the west say they have launched a major push toward a key town along the Mediterranean coast near Tripoli.
Hundreds of fighters are on the move along the road in Yafran toward the front lines, where heavy fighting seems to be under way on Saturday.
The ground is reverberating with loud booms and rocket fire is echoing from the distance.
Two Libyan rebel fighters, Jumma Hussein and Youssef Bilin, say their forces are trying to "first liberate Bir Ghanam" and then capture a key coastal town, Zawiyah, before heading on to Tripoli.
The rebels said earlier this week they hope to reach the Libyan capital before the end of the Muslim holy month of Ramadan.