The natural gas wells and pipelines running through Cadereyta and the U.S-Mexico border have also been the most tapped by thieves Theft , supplying Supply gasoline and other natural resources to Mexico 's criminal underworld Committing_crime .

After the gunmen descended Departing from their vehicles , they quietly stormed Attack the casino 's main entrance , opened Action fire on a few gamblers and guests , and then doused Filling the casino entrances with gasoline and started Action a fire that trapped Bodily_harm the people inside .

A subsequent Naval Board of Inquiry never determined Deciding the exact cause of the disaster but concluded Process_end that the initial explosion was caused Causation when a mortar round aboard detonated Attack during an unloading operation because it was either dropped Motion_directional or went off when gasoline vapors ignited .

Numerous gasoline explosions Catastrophe in the sewer system and fires Catastrophe over four hours destroyed Destroying of streets .

Some residents even found Know gasoline coming Motion out of their water pipes .

City workers were dispatched Sending to check Scrutiny the sewers and found Know dangerously high levels of gasoline fumes .