EU president Donald Tusk urged a crackdown on the "murderers" among human traffickers who have killed scores of people trying to reach Europe from conflicts abroad.
British Prime Minister David Cameron suffered an embarrassing defeat in parliament over how the referendum he has called on leaving the European Union will be conducted.
Turkish Prime Minister Ahmed Davutoglu criticised the "ridiculously small" share of refugees the EU is accepting, labelling the continent the "Christian fortress Europe."
The EU is preparing to step up action against people smugglers in the Mediterranean, actively seizing the boats which carry thousands of hapless migrants to Europe.
A market in fake Syrian passports has sprung up, particularly in Turkey, to help migrants and refugees enter the EU, the head of Europe's border agency Frontex said.
EU foreign policy chief Federica Mogherini expressed concern over "very worrying" deadly clashes in Kiev as Ukrainian lawmakers backed an autonomy plan for rebel regions.
Greece geared up for a snap election next month, with an opinion poll showing the leftist party Syriza ahead despite a wave of defections over the country's massive new bailout.
Interior and transport ministers from EU countries are to hold talks in Paris to discuss security measures following last week's attack on a high-speed train that was foiled by passengers.