In 1966 he developed plastic explosive Semtex.

Contrary to reports in Paris last week, government investigators working at the central police laboratory here have ruled out the presence of the Czechoslovak-made explosive Semtex, which caused the Lockerbie disaster.

A smaller cache, including the potent, Czech-made explosive Semtex, was unearthed in Sicily, the mob's heartland, last April.

Two components of the explosive Semtex were detected on wreckage from the passenger cabin.

But Britain is apparently adamant that there be verifiable destruction of the explosive Semtex.

The Czech government said it would take back control of Explosia, the company that makes the plastic explosive Semtex, less than two months after its parent, the chemical conglomerate Unipetrol, was privatized.

These include causing the explosion using Semtex high explosive 'likely to endanger life' at Brompton Road, Knightsbridge, on Thursday, January 28.

Investigators say they have found traces of the powerful explosive Semtex in remnants of the French DC 10 airliner that crashed in Niger on Sept. 19, killing 171 people, two French newspapers reported today.

Synthesia is also a major exporter mainly for the EU countries and is associated with the invention of explosive Semtex.