11.   The other case, which is pending, stems from a police raid in March of a suspected methamphetamine laboratory in a trailer home in suburban Denver.

12.   The pills were sold to methamphetamine laboratories on the West Coast, many of them in California, officials said.

13.   The officials announced that since September, they had seized three methamphetamine laboratories around Los Angeles.

14.   Fire officials said they did not know the cause of the explosions, but speculated that it could have been a ruptured natural gas line or a methamphetamine laboratory.

15.   Methamphetamine laboratories have also been found in northern and central Thailand and in the capital, Bangkok.

16.   The participants will also learn proper methods for handling and disposing of toxic chemicals used in clandestine methamphetamine laboratories.