The issue is sensitive in part because US presidential contender Donald Trump has called for a temporary ban on Muslims visiting the US due to concerns about extremist attacks.
The issue is sensitive in part because US presidential contender Donald Trump has called for a temporary ban on Muslims visiting the US due to concerns about extremist attacks.
"I hope 2016 becomes a year when this war ends and world leaders must try."
About half of the people entering Europe in 2015 were Syrians, while 20 per cent were Afghans and 7 per cent Iraqis, the IOM said.
IOM director-general William Lacy Swing urged European governments to make migration safer.
UNHCR says half of those reached Europe were Syrians fleeing their country's civil war.
The raids in the wider Sarajevo area targeted around 15 individuals, the statement from the office of the Bosnian chief prosecutor said.
The device was made of cardboard, paper and a household timer; six passengers being questioned.
The passports could be issued to would-be attackers to enter the European Union as asylum seekers, warns intelligence agencies.
PM Rajoy's party, Socialists, two upstart leaders in race for power.
Putin did not elaborate on the specifics of Russia's cooperation with the US and Syria.