Fanatical guerrillas of the communist Khmer Rouge have forcibly relocated thousands of Cambodian refugees, trapping them in a heavily mined, malarial jungle, Western relief officials said Wednesday.

They said that since June, the guerrillas have moved all but 1,000 of 9,500 refugees from the U.N.-aided camp of Ta Luan in Thailand's eastern Trat province to a new camp on the Cambodian frontier several miles away.Several thousand other refugees were moved to the border from the O'Trao-Natrao camp in northeast Surin province.