The New Zealand Government is advising Kiwis in Ukraine to leave immediately, as a possible Russian invasion looms, News Hub reported.

"In response to heightened tensions between Russia and Ukraine, the New Zealand Government is advising New Zealanders in the Ukraine to leave immediately while there are commercial flights able to get them home," Foreign Affairs Minister Nanaia Mahuta said in a statement on Saturday.

Mahuta added that Kiwis registered on SafeTravel, a site that provides travel advice and risk assessment for New Zealanders, have been notified directly and encourages Kiwis in Ukraine that are not registered to do so.

"Aotearoa New Zealand does not have diplomatic representation in Ukraine and the government's ability to provide consular assistance to New Zealanders in Ukraine is therefore very limited," Mahuta said. "The security situation in Ukraine could change at short notice and New Zealanders should not rely on support with evacuating in these circumstances."

"Aotearoa New Zealand calls on Russia once more to take immediate steps to reduce tensions and the risk of a severe miscalculation," Nanaia Mahuta added.