ALLEGED Cambodian spy Ung Kimthai was charged with national security offences in Thailand on Monday, a Thai official said yesterday. Ung Kimthai could face up to 10 years in jail if the Thai Attorney General verifies the charge and successfully prosecutes him, Victor Paris, a Thai Foreign Affairs Ministry official, said. Thai Suchart Muhammad and Vietnamese national Nguyen Tengyang were also charged with national security offences, he added. Suchart Muhammad and Ung Kimthai face further charges of possessing illegal amphetamines. All three men remain in provisional custody in Sisaket province.