European Union counter-terrorism chief Gilles de Kerchove on Friday called for greater vigilance by EU borders agency Frontex, saying jihadists could infiltrate posing as refugees.
The warning came as more than 50,000 people sought political asylum in Europe in 2014, a 44 percent hike over the previous year. Twenty percent of those applicants were Syrians, the Eurostat agency said.
"We must be vigilant. It is relatively easy to enter into the European Union when one joins an influx of refugees," de Kerchove said on the sidelines of a ministerial meeting in Vienna.