The European Commission is proposing a force with a stronger mandate than the EU's current Frontex border teams.<br />But some governments see the powers as violating national sovereignty.<br />The commission is also proposing to resettle Syrian refugees directly from camps in Turkey to try to stop people taking the dangerous voyage by sea.<br />Poland says it will oppose any move to send in EU border guards without the host country's approval.<br />Foreign Minister Witold Waszczykowski said such powers "would mean that this would be an undemocratic structure, not controlled by the member states".<br />But he said strengthening Frontex "is necessary in every sense".<br />Frontex - an EU agency based in Poland - is already poised to send border guards to Greece, where almost 800,000 migrants have arrived by sea this year.<br />Most of them are refugees from Syria, Iraq and Afghanistan.