Slovakia will file a lawsuit by Dec. 18 challenging the European Union's planned quota system that will see 120,000 asylum seekers distributed among member countries, Prime Minister Robert Fico said on Sunday. Slovakia, the Czech Republic, Hungary and Romania opposed the mandatory quotas for redistributing migrants from Italy and Greece, but were outvoted at a meeting of EU interior ministers in September. Slovakia, which is due take in 802 migrants under the scheme, immediately said it would challenge the decision, arguing it had no power to keep migrants in if they wish to move on to Germany and other richer EU member states.