British politician, Sayeeda Warsi accuses those campaigning for Britain to leave the European Union of spreading lies, hate and xenophobia, saying she is switching to the "Remain" camp.
Greece begins evacuating thousands of stranded migrants from the makeshift Idomeni camp on its northern border with Macedonia.
The Turkish minister for European Union affairs says he is losing hope of getting a deal on visa-free travel for Turks within Europe.
Last month's EU-Turkey deal on tackling the migrant flow has begun to produce results, a top EU official says.
Greek authorities are gearing up to send hundreds of failed asylum-seekers back to Turkey, which is racing to set up reception centres under a controversial EU deal.
Nato ships are being deployed to the Aegean sea to deter people-smugglers taking migrants from Turkey to Greece, Nato chief Jens Stoltenberg says.
More than 10,000 migrant children may have disappeared after arriving in Europe over the past two years, the EU's police intelligence unit says.
Five times more attacks were carried out on migrant hostels in Germany last year than in 2014, German police say.
German Chancellor Angela Merkel proposes changes to make it easier to deport asylum-seekers who commit crimes, after the New Year's Eve sex attacks on women in Cologne.
Austria saw the arrival of at least 10,000 migrants, amid bitter rows among EU nations on how to handle the growing crisis.
Eight rescue operations picked up more than 2,200 people off the Libyan coast, according to the Italian coastguard from 10 boats in distress in the Mediterranean.
Migrants stranded in Croatia are making renewed efforts to head north despite moves by Slovenia and Hungary to hold them back.