1.   Oil firms have been hampered by leftist guerrillas, who attack oil pipelines, kidnap technicians and extort millions of dollars in ransoms.

2.   Once the forum begins, the ELN has promised to refrain from attacking oil pipelines.

3.   The Cano Limon-Covenas pipeline was attacked on Friday, said Colombian state petroleum company Cia. Colombiana de Petroleos, known as Ecopetrol.

4.   The rebels often attack the pipeline in remote, mountainous areas, so that repair crews must use helicopters to lower the new pipe into place, Stewart said.

5.   The Burmese army is trying to wrest control of the area from ethnic insurgents, who, in turn, have vowed to attack the pipeline.

6.   The pipeline was attacked at least three times last month.

7.   Tribesmen have retaliated by attacking the pipeline by blowing holes in it and then lighting the fuel on fire with a tracer round or a blow torch.

8.   The pipeline has been attacked several times by KNU guerrillas.