GENEVA: The United Nations said on Saturday the Iran-Israel war must not be allowed to trigger another refugee crisis in the Middle East, saying once people fled there was no quick way back.

UNHCR, the UN’s refugee agency, said the intensity of the attacks between the two sides was already triggering population movements in both countries.

Such movements had already been reported from Tehran and other parts of Iran, it said, with some people crossing into neighboring countries.

Strikes in Israel had caused people to seek shelter elsewhere in the country and in some cases abroad.

“This region has already endured more than its share of war, loss and displacement. We cannot allow another refugee crisis to take root,” said Filippo Grandi, the UN high commissioner for refugees.