CARACAS (Reuters) -Eleven people have been arrested as part of an investigation into an explosion and fire at a major gas complex last week, Venezuela's vice-president and oil minister Delcy Rodriguez said on Monday. The Muscar gas complex in the country's eastern Monagas region, operated by state oil company PDVSA, was temporarily shutdown after a pipeline explosion caused a fire, injuring at least five workers and forcing tougher power rationing in some places. Several foreigners connected to the case have fled the country, Rodriguez said, adding PDVSA had suffered $157 million in impact, though it was unclear if that figure corresponded only to the Muscar incident or to others as well.