ROUGH CUT (NO REPORTER NARRATION)<br/> <br />STORY: Libya is investigating the cause of an explosion late on Tuesday on oil and condensate pipelines to the eastern port of Zueitina, the National Oil Corporation said.<br/> <br />The blast occurred at 10 p.m. local time on a section of the pipeline linking Field 103, which is operated by Zueitina Oil company, to the export terminal, the state energy firm said in a statement on its website.<br/> <br />It quoted acting NOC Chairman Abdulkasir Shengir as saying there were no casualties and that a crisis committee had been formed to carry out an investigation.<br/> <br />Oil workers were trying to repair the damage and had cut about 2 meters of the pipeline. A fire was still burning at the condensate pipeline about 5 kilometers away, although officials said it was smaller than before.