Some 36,400 asylum seekers and migrants have already landed in Italy, Spain, Greece, Cyprus and Malta this year, after 123,318 arrivals in 2021, according to the United Nations refugee agency.

Overall numbers, however, remain significantly below those of 2015, when over 1 million migrants reached the five countries to flee poverty and conflict across Africa and the Middle East.

A shortage of wheat and other grains could affect 1.4 billion people, United Nations crisis coordinator Amin Awad said on Friday, adding more negotiations were needed to unblock the ports in Ukraine to avoid famine and mass migration around the world.

Russia and Ukraine account for nearly a third of global wheat supplies, while Russia is also a key fertilizer exporter and Ukraine a major supplier of corn and sunflower oil.

"If wheat remains blocked in the Black Sea ports, we must expect a greater (migrant) flow," Italian interior minister Luciana Lamorgese told SkyTG24 on Friday. "We are concerned, as are all frontline countries."