Khmer Rouge radio on Saturday denied that it was broadcasting from Thai territory, and attacked the Cambodian government for spreading "deceitful lies" about the matter.
"Communist Vietnam and puppet Hun Sen have ordered their propaganda machine to disseminate deceitful lies saying that the radio of the National United Army is broadcasting from Thai territory," the radio said.
"This is another gross and broad daylight lie ... the NUA radio categorically denies these deceitful and slanderous reports," it said.
The Cambodian government had issued the reports to "dupe national and international opinion into believing that the resistance forces have no territory of their own," according to the radio.
"These deceitful reports are aimed at leading the national and international opinion into believing that Thailand is involved with the Cambodian resistance forces," it said.
NUA radio is located "in the liberated zone on Cambodian territory ... covers a huge area, hundreds of kilometres long and hundreds of kilometres wide," it said.
BBC Monitoring (http://www.monitor.bbc.co.uk), based in Caversham in southern England, selects and translates information from radio, television, press, news agencies and the Internet from 150 countries in more than 70 languages.