Six migrants from a fishing boat drifting south of Spain’s Canary Islands died and 67 others were rescued, Spanish authorities and a cruise ship operator said on Thursday. Initially 68 survivors had been taken on board the cruise ship, the Insignia, but one of them died on board, said Spain’s maritime safety and rescue authorities, Salvamento Maritimo. That brought the number of deaths to six after five bodies were found on board the vessel. “One of the survivors was in a critical condition and had to be evacuated, but in the end the doctor on board confirmed that he had died,” Salvamento Mari…