Prime Minister Anutin Charnvirakul, who is also interior minister, signed the Interior Ministry order on Oct. 28, Khaosod English reported.

Kantor's citizenship was granted in a Royal Gazette announcement on April 11, 2013, and he received his first Thai national ID card on May 2 that year.

The Justice Ministry's Department of Special Investigation (DSI) said Kantor had used his U.S. nationality to enter and leave Australia 16 times, most recently on Jan. 26.

The Interior Ministry said that breached the conditions of his naturalization, which he had acknowledged when he applied.

The Nationality Act of 1965 allows citizenship to be revoked when a naturalized citizen is found to be still using a former nationality.

The ministry also said the DSI had been investigating naturalized foreigners for acts that could affect Thailand's security, economically and socially, Bangkok Biznews reported.

Kantor has led Chabad of Thailand since 1993. Bloomberg described him as Thailand's chief rabbi, and Chabad as a global Orthodox Jewish movement headquartered in New York.

A U.S. passport held up against a map of Southeast Asia and the Indian Ocean. Photo by Unsplash/Global Residence Index

Anutin's government, which won February elections on a nationalistic, Thailand-first platform, has taken a tougher line on some foreign residents and visitors even as tourism remains crucial to the economy, the news agency said.

Rules introduced in August allow faster deportation of foreigners whose conduct is deemed harmful to public order, while authorities have stepped up investigations into foreign-controlled businesses and land held through Thai proxies.

Kantor's case follows the Oct. 1 revocation of a businessman's Thai citizenship, after authorities said he had kept using an Israeli passport and failed to disclose his Uruguayan nationality when he was naturalized.

Investigators also searched Chabad and other Jewish-linked premises in October while examining suspected nominee businesses and property holdings.

Rabbi Nechemya Wilhelm, Chabad's emissary in Bangkok, said after the searches that the organization had cooperated fully and had "nothing to hide," The Jerusalem Post reported.