1.   Both pipelines are owned by consortiums of major oil companies, and compete to ship petroleum products from the Gulf Coast to the Northeast U.S.

2.   Even after the Justice Department brought the case, Koch refused to say what pipelines it owned, officials said.

3.   For instance, Enron owned pipelines that helped the company fulfill commitments to deliver natural gas.

4.   John Barnett, a spokesman for Texas Eastern Transmission Corp., which owns the pipeline that exploded, said the company supported the proposals.

5.   Kinder Morgan also owns a pipeline that carries carbon dioxide to western Texas.

6.   Kinder Morgan Energy, based in Houston, now owns two pipelines that ship fuels derived from natural gas such as propane and butane to the Midwest and Louisiana.

7.   The company, which owns natural gas pipelines, cited the need to assess financial obligations related to the spin-off of Williams Communications.

8.   But the powerful state petroleum corporation, which owns the pipeline, reportedly wants officials to charge whoever caused the leak.

9.   It was not immediately clear which company owned the pipeline.

10.   Officials said companies which own pipelines need to be more vigilant.