Poland's Prime Minister Donald Tusk criticised a decision by Germany to tighten controls on its land borders, calling on Tuesday for urgent consultations with other affected countries and more support for Warsaw's own immigration policies.

Polish Prime Minister Donald Tusk on Tuesday condemned neighboring Germany’s decision to tighten border controls in its bid to clamp down on irregular migration. “From the Polish point of view, this type of action is unacceptable,” Tusk said during a meeting of Polish diplomats.

Polish Prime Minister Donald Tusk has denounced as "unacceptable" Germany's decision to extend temporary controls to all its land borders as part of its response to irregular migration. He is one of several figures from neighbouring countries to criticise the move.

The border closures are set to last six months and are threatening to test European unity. Most of Germany's neighbors are fellow members of the European Union, a 27-country bloc based on the principles of free trade and travel.

Germany on Tuesday insisted its move to launch border controls with its nine neighbouring countries to stop irregular migrants is in line with the EU's rules and not an attempt to go it alone.

The announcement comes after weeks of intense debate sparked by a knife attack that killed three people in Solingen, a town just north of Düsseldorf in western Germany. Less than a week after the attack,