"Some of the explosives seem to have been there for a while, over months," said Lieut. Gerald Sheehan of the Police Department's arson and explosives unit.

Three Mark-77 napalm canisters, three C.b.u-55 fuel-air explosives units, and six C.b.u-59 cluster bombs units.

Nor does any other European Union country, said Donald Manross, a senior American official in the firearms and explosives unit of Interpol, the international police agency, in Lyons, France.

He was in charge of the explosives unit and also dealt with motion picture and television production companies that filmed scenes of fires and explosions in the city.

This damning indictment essentially vindicates long-ignored complaints by Frederic Whitehurst, a chemist in the lab's explosives unit.

The inspector general's inquiry began in 1995 after complaints by Frederic Whitehurst, a chemist in the lab's explosives unit.

Sgt. Larry Crookshanks of the Los Angeles County arson and explosives unit said that four investigators were following up on reports of people who said they saw the fires being set.

They are David Williams, who supervised evidence collection; Roger Martz, head of the laboratory's chemistry unit, and James T. Thurman, chief of the laboratory's explosives unit.

"Soldier for four years, assigned to Major Kim Lee's explosives unit-" "There you go," said Herbert, an edge of triumph.

The report recommended that David Williams, an examiner in the explosives unit and the principal examiner in the Oklahoma City bombing case, be censured.