Panamanian police said they were investigating the disappearance of two Spanish citizens in the Darien jungle. Information about the disappearance of the aid workers in the remote area has been sketchy, with some media outlets reporting that they were kidnapped by a group of armed men. "We don't have new information, but the search is continuing," a police spokesman told EFE.Spanish ambassador to Panama Gerardo Zaldivar said authorities were trying to determine what happened last Friday to Jose Vicente Colastra and his son, Sergio Colastra. The two men were working on a construction project in the Darien for the Tierra Viva Foundation, which promotes sustainable development. Panamanian police are searching the area between the town of Jaque and the border with Colombia, some 300 kilometres (about 186 miles) east of Panama City. The two Spaniards were part of a team of 19 people who were working with refugees in Jaque, the La Prensa newspaper reported. Colombian paramilitaries, guerrillas, gun smugglers and drug traffickers operate in the Darien, which separates Panama from Colombia.