By Loucoumane Coulibaly and Ange Aboa
ABIDJAN (Reuters) - Forces loyal to Ivory Coast's presidential claimant Alassane Ouattara took the official capital and advanced to within 130 km (80 miles) of the cocoa port of San Pedro on Wednesday, witnesses said.
Forces loyal to Ouattara have launched offensives from the east, west and center of the country in recent days in a southward push to dislodge incumbent Laurent Gbagbo.
Resisting pressure from the African Union and the West, Gbagbo has refused to leave since a disputed election last November which U.N.-certified results said he lost.
The U.N. says 472 people have been killed since the standoff began, and a humanitarian crisis is worsening, with a million people displaced from the commercial capital Abidjan alone.
Pro-Ouattara forces now control areas growing about 600,000 tons of cocoa a year, half of national output in the world's biggest producer.
Prices have hit 30-year highs in recent months on supply worries due to the conflict, but have eased since the start of the Ouattara push. London cocoa was down 2.7 percent on Wednesday on hopes that exports could soon be freed up.
Residents and military sources in Yamoussoukro, which is officially the nation's capital but functions as little more than a presidential retreat, said pro-Ouattara forces had taken control by the end of the afternoon.
"It is the (pro-Ouattara) Republican Forces that control Yamoussoukro," a military source in Gbagbo's camp said. "(Ouattara's forces) are walking through the city."
Several residents confirmed the information and a pro-Gbagbo military source said they had been given the order to pull back toward Abidjan, 215 km to the southeast.
Clashes were reported in the town but it was not clear what had happened to the Republican Guard, a pro-Gbagbo unit that was expected to put up resistance to any Ouattara push.
Another group of pro-Ouattara fighters, largely made up of former rebels who have controlled the north since a 2002-3 civil war, took control of Soubre, the last main town on the road to the cocoa port of San Pedro.
"The Republican forces took the town without any resistance," said Madou Kone, a resident.
Meanwhile, pro-Gbagbo youths killed seven civilians when they opened fire in a pro-Ouattara neighborhood of Abidjan, witnesses said.
"The youths arrived this morning. Some were wearing masks, some combat fatigues. They fired at random on people on the side of the road," Badou Jean, a market trader who witnessed the incident, told Reuters after he fled with his family.
As the fighting has intensified, about 30,000 Ivorians and West African migrants have been forced to seek refuge in an overcrowded Catholic mission in the town of Duekoue with little or no access to food, water or health facilities, the International Organization for Migration (IOM) said.
Thousands more have sought shelter in public buildings and at least 112,000 have crossed into Liberia to the west.
A Reuters reporter on the road east out of Abidjan said hundreds of cars were clogging roads heading out of the city.
ARMING THE PATRIOTS
Until the push south this week, the worst of the violence had centered on Abidjan, where anti-Gbagbo insurgents, who do not necessarily support Ouattara, have seized parts of town.
A Reuters witness heard heavy weapons fire coming from the area around Agban, the main gendarmerie camp, in the early afternoon. A pro-Gbagbo military source confirmed clashes had taken place but gave no further details.
In a sign violence could become much more widespread, the army called on youths loyal to Gbagbo to enlist in the military.
"The Young Patriots are at army headquarters to pick up weapons to go and fight. They will get a few days of training," an officer at army headquarters said.
Gbagbo's often violent youth wing is considered his most dangerous and unpredictable weapon. They have caused mayhem in the past and have recently set up road blocks, armed with AK-47s, sticks and machetes.
The deputy chief-of-staff for the Ouattara-backed forces, Issiaka Ouattara, was quoted in the Ivorian newspaper Nord-Sud as saying their objective was to restore democracy and ensure that the choice of the people who elected Ouattara is respected.
Gbagbo's government on Tuesday called for an immediate ceasefire and the opening of dialogue but said the advancing forces could not take Abidjan.
(Additional reporting by Andrew Callus in Geneva; Writing by David Lewis and Tim Cocks)