The government of Cyprus said on Monday it would revoke the passports of Turkish Cypriot officials in the breakaway state in the northern part of the island.
A number of Turkish Cypriot officials, including incumbent leader Ersin Tatar, hold or previously held passports from the Republic of Cyprus even though they administer the Turkish Cypriot state.
The Mediterranean island was split in a Turkish invasion in 1974 after a brief Greek-inspired coup.
North Cyprus is recognised only by Turkey, while the Republic of Cyprus, run by Greek Cypriots, is internationally recognised.
The present Cypriot administration, which made billions selling passports to thousands of people, including Russian oligarchs, a Malaysian fugitive and well-connected Cambodians, said the actions of the Turkish Cypriot officials undermine the integrity of Cyprus.
Reunification attempts have repeatedly failed and relations are at a new low in a dispute over offshore energy reserves, a Turkish Cypriot demand that peace talks be placed on a new footing and Turkish moves to open part of a fenced-in city abandoned by its residents in the 1974 war.
Cyprus will revoke, fail to renew or refuse to issue passports to those who have participated in the “pseudo state's Cabinet” or were involved in attempts to reopen Varosha, government spokesman Marios Pelekanos said.
“With their acts and deeds, they undermine the sovereignty, independence, territorial integrity and security of the Republic of Cyprus, in violation of the constitution,” Mr Pelekanos said.
Turkish Cypriot media reported the move concerned 14 people, including Mr Tatar.
In July, Turkish Cypriot authorities announced a partial reopening of the beach suburb of Varosha for potential resettlement, but it brought a strong rebuke from Greek Cypriots who regard it as a land-grab.
The area has been a Turkish military zone with no settlement permitted for decades.
Tens of thousands of Turkish Cypriots hold identification cards and passports from the Republic of Cyprus, as is their birthright based on the common state established with Greek Cypriots in 1960.
The Communist AKEL, the main Greek Cypriot opposition party, said the passport decision was for domestic consumption only, and that authorities should focus on initiatives to “arrest the partitionist designs of Turkey".
Erato Kozakou Marcoullis, a former foreign minister and long-time diplomat, tweeted: "[A] short-sighted and impulsive policy! They are removing the only element of proof that 'officials' of the Turkey-subordinate regime do recognise the Republic of Cyprus.”
Local media have reported that Mr Tatar, a strong proponent of Turkish Cypriot independence, obtained a Cypriot passport in 2000.
Mr Tatar is the son of a prominent technocrat who acted as an adviser in talks leading to the establishment of the Republic of Cyprus in 1960 after independence from Britain.