pbr Spanish air traffic controllers are beginning to return to work following a wildcat strike, an airports authority spokesman has said.br ppbr Earlier Spain's Socialist government declared a state of emergency and said those controllers who did not return to work would be breaking the law.br ppbr "The controllers are returning to work and nearly half of the airspace sectors are open," the AENA spokesman said.br ppbr But the disruption is set to continue. Spanish carrier Iberia cancelled all flights until 5am on Sunday, and budget carrier Ryanair scrapped all its Spanish flights on Saturday.br ppbr EasyJet is the latest airliner to cancel flights, it announced that all services in and out of Spain, the Canary Islands, Portugal and Morocco would be cancelled until Sunday morning.br ppbr The military took over air control towers following the walkout on Friday afternoon by controllers, which quickly stopped flights in and out of Spain's main airports, disrupting travel for around 250,000 people on one of Spain's busiest holiday weekends.br ppbr The unofficial stoppage followed cabinet approval of changes to rules on the number of hours air traffic controllers can work per year and of a law allowing the army to take over airspace in times of emergency.