A leading Internet provider in the Emirates said an undersea cable had been cut in the Persian Gulf, causing severe phone line disruptions and compounding an already existing Internet outage across large parts of the Middle East and Asia after two other undersea cables were damaged earlier this week north of Egypt. Omar Sultan, chief executive of Dubai's IPS DU, said Friday that the incident was "very unusual." He said it was not known how the underwater FLAG FALCON cable, stretching between the United Arab Emirates and Oman, had been damaged. "The situation is critical for us in terms of congestion" on international lines, Sultan told The Associated Press, but refused to speculate on the extent of the damage. DU said in a press release that the cause of the incident "had not yet been identified."