a on Thursday said it will halt fuel supplies to key oil client Switzerland, in the latest reprisal for last week's brief detention in Geneva of Hannibal, a son of Libyan leader Moamer Kadhafi. The supplies affected are those transported by ships operated by the Libyan national maritime transport company only, a statement by the company said. Oil transported by commercial vessels would not be affected. A joint statement by the national maritime transport company and the port authority threatened further, unspecified reprisals and said Swiss-flagged ships had been banned from entering Libyan ports. The statement warned of "new escalatory measures" against Switzerland and demanded that Bern "closes within the next few hours the case it fabricated" against Hannibal.