Methamphetamine is an addictive stimulant made in clandestine laboratories nationwide.

If that becomes too expensive and risky, they will switch to manufacturing it here in clandestine laboratories.

As a result, Ecstasy is now manufactured only in clandestine laboratories.

Increased involvement has resulted in larger and more sophisticated clandestine laboratories being detected in Australia.

In 2008-09, a record 449 clandestine laboratories were detected in Australia (a 26 per cent increase from 2007-08).

The refinement into pure heroin in one of a dozen clandestine laboratories.

The group's five helicopters and two planes also search for missing people, suspects, clandestine laboratories, etc.

Made in clandestine laboratories from cheap ingredients, it is known as speed, meth, chalk, ice, crystal and glass.

This leads them to a clandestine laboratory where a secret experiment is taking place on board on a naval ship.

The most specific evidence of an illicit program was apparently a network of clandestine laboratories operated by the Iraqi intelligence service.