The Panama Canal Authority says, work on the project to widen the important shipping route has been suspended because of the dispute over the rising costs.The head of the Spanish firm leading the consortium, said, the company is willing to continue negotiations.Just over a month ago, the building consortium led by the Spanish company gave the Panamanian authorities a deadline to pay 1.6 billion dollars in added costs to the project. Panama refused and blamed the building companies for increased construction bill. Its impact would be felt across the region where many ports have invested heavily expecting greater business following the widening of the Canal.