A pipeline company responsible for half of Bolivia's natural gas exports to Brazil says those exports have been completely cut off, AP reported. A senior advisor to the pipeline company, Transierra, tells The Associated Press that a pipeline that sends 14 million cubic meters of gas a day to Brazil was shut down for repairs after an explosion. The advisor, Hugo Munoz, says it's not clear how long the pipeline will be shut. Brazil receives 30 million cubic meters of gas a day from Bolivia - half its supply.