Q Radio News/PA
The Republic's Department of Foreign Affairs has advised Irish citizens in Ukraine to leave immediately.
The updated advice comes as fears grow that Russian President Vladimir Putin could order an invasion in the coming days.
Ireland will keep its embassy in Kyiv open with a small number of essential staff remaining.
A department statement said:
“Following intensive consultations overnight and this morning with EU partners in Kyiv and Brussels, and with other partners, the Department of Foreign Affairs has upgraded travel advice for Ukraine.
“We advise against all travel to Ukraine and ask citizens currently in Ukraine to leave immediately by commercial means.”
The updated advice comes as fears grow that Russian President Vladimir Putin could order an invasion in the coming days