Costa Rican authorities are investigating whether Joaquin "El Chapo" Guzman, the world's most wanted druglord, has surfaced in that country. A photograph posted on a social media account linked to the fugitive's son, Jesus Alfredo Guzman Salazar, 29, appeared to have been taken in the Central American country, ICR News reported.It showed Salazar with a man, his face partially obscured, who bore a resemblance to his father, the leader of Mexico's Sinaloa drugs cartel.The image was dated August 31 and was accompanied by a comment taunting the authorities: "August here, already know who."It was taken in a restaurant. The person who uploaded the image appeared to have forgotten to turn off a feature on Twitter which automatically reveals the location.Beneath the image were the words "Costa Rica", either the country or the village of Costa Rica, in Sinaloa, Mexico. The Judicial Investigative Police in Costa Rica said they were investigating. Officials said they had no record of Salazar entering the country.However, like his father, he is wanted by the US Drug Enforcement Administration and would be likely to have arrived secretly.The head of the prison from which Guzman recently escaped, and several senior officials, have been fired.The escape was a devastating blow to Mexican President Enrique Pena Nieto in his fight against drug cartels. Mexico and the US have offered millions of dollar for information leading to his recapture.Mexican soldiers rushed to the scene after reports that Guzman had been seen at a hospital but were too late. ..