Euphoric Libyan rebels raced into the capital Tripoli on Sunday and moved close to centre with little resistance as Muammar Gaddafi's defences collapsed and his regime appeared to be crumbling fast. Associated Press reporters with the rebels said they moved easily from the western outskirts into the regime stronghold in a dramatic turning of the tides in the 6-month-old Libyan civil war. A rebel leader said the unit in charge of protecting Gaddafi and Tripoli had surrendered and joined the revolt, allowing the opposition force to move in freely.