GROSSETO, Italy — The Italo-Spanish clash on border controls is escalating.

Italy on Friday said it has no intention of suspending border checks on travelers from Spain, “a friendly country,” and rebuffed Madrid’s threats to retaliate if Rome maintains the emergency measures it instituted in response to the mass arrival of migrants in the Spanish exclave Ceuta last week.

“Italy does not accept ultimatums or demands from abroad regarding national security and border control,” the Office of Italian Prime Minister Giorgia Meloni wrote in a statement.

Earlier in the day, the Spanish government had threatened to take “proportional measures” if Rome did not stop its reintroduced border checks and temporary suspension of the Schengen Agreement by Aug. 9.

In its statement, Rome said it would keep these controls in place “at least until August 15 and, in any case, until security and terrorism risks to Italy can be completely ruled out,” adding that a new “migratory wave” is expected in Ceuta on that date.

“Only when it is certain that there will be no security or terrorism risks for Italy, that there will be no new wave and that there are no irregular migrants heading toward European territory will it be possible to reconsider what has already been decided,” said the document.