HELENA, Mont. (AP) _ The FBI found a collection of scrap metal, pipe and tools underneath Theodore Kaczynski's mountain cabin, according to court documents released Friday.

The search, conducted last Saturday, turned up 26 items.

Earlier searches of Kaczynski's 10-by-12 foot shack turned up bombs, triggering devices and detonators. Justice Department sources have said the evidence linked Kaczynski to the series of Unabomber bombings that killed three people and injured 23 over the past 18 years.

A court order for the latest search was issued May 9, the same day the plywood cabin had been removed from Kaczynski's property near Lincoln. The building was carried by truck to Malmstrom Air Force Base in Great Falls before dawn Wednesday.

The new search warrant indicated that FBI agents might use electronic detection and digging equipment to search underground.

The search produced a large piece of lead wrapped in plastic bags, 14 pieces of scrap metal, six hacksaw blades, a wooden mallet, a metal bar, pipe, pick shovel, and metal file.

Earlier news reports said that FBI agents had searched an underground tunnel system near Kaczynski's shack two days after he was arrested April 3. The initial search of the cabin lasted 12 days.

Kaczynski, charged with possessing bomb-making components, has been in jail at Helena without bond since his arrest. He has yet to be indicted and has not been charged with any of the Unabomber bombings.

On April 19, U.S. District Judge Charles Lovell rejected Kaczynski's request to be released because of what his attorney contends was a pattern of leaks about the case by anonymous government sources. That ruling has been appealed to the U.S. Supreme Court.