A substantial cache of gold bars believed smuggled out of the Philippines by the late president Ferdinand Marcos may be lying in an airport warehouse in Switzerland, a senior official said.

David Castro, chairman of the Presidential Commission on Good Government (PCGG), was quoted by the Philippine Free Press weekly Monday as saying he had documents showing Marcos took the gold from the Central Bank mint.They were flown to Zurich by a Filipino pilot, he said.

"Our intelligence people there (in Switzerland) are saying that there are gold deposits in Kloten, the airport that is the counterpart of our bonded warehouse," Castro said.

President Corazon Aquino, who led a popular revolt that toppled Marcos in 1986, formed the PCGG to recover wealth believed to be hidden here and abroad by the Marcos family and its associates.