Story highlights Singapore government alleges professor was trying to influence foreign policy

Ministry has not specified which country Huang Jing is accused of working for

(CNN) An academic will be forced to leave Singapore forever after the government accused him Friday of acting as "an agent of influence of a foreign country."

Huang Jing, and his wife, Shirley Yang Xiuping, have had their entry permits to Singapore canceled and been labeled "prohibited immigrants," according to the Ministry of Home Affairs.

"Huang used his senior position in the Lee Kuan Yew School of Public Policy to deliberately and covertly advance the agenda of a foreign country at Singapore's expense," a ministry's statement said Friday.

"He did this in collaboration with foreign intelligence agents. This amounts to subversion and foreign interference in Singapore's domestic politics. Huang's continued presence in Singapore, and that of his wife, are therefore undesirable. Both will be permanently banned from re-entering Singapore."

Huang, a US citizen, was a professor on US-China relations at the Lee Kuan Yew School of Public Policy , situated inside the National University of Singapore.

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