Spain and Italy have started checking travelers crossing between their two countries, each retaliating after the other imposed checks first.
A surge of migrants crossing into Ceuta, a Spanish territory in North Africa, led 22 EU countries to demand Spain be punished, even suspended from Schengen, the EU zone where people can travel without passport checks.
Italy has reinstated passport checks on non-EU travelers arriving from Spain, using a Schengen rule that lets any EU country restore border checks on its own, only informing Brussels afterward.
Italy, Finland and Austria are demanding that Spain be suspended from Schengen, the European agreement that lets people cross many borders without passport checks, after about 60,000 people crossed into Spain's Ceuta enclave in North Africa.
The European Union is preparing its biggest single sanctions move yet: blacklisting more than 1,600 companies accused of helping Russia's war effort, a 50 percent jump in the number of firms already under EU sanctions.