France called Monday on the European Union to do more to detect false Syrian passports, especially in Greece and Italy, after two of the suicide bombers in the Paris attacks were found to be carrying such documents, AFP reports.

The attacks "unfortunately showed that some terrorists are trying to get into our countries and commit criminal acts by mixing in with the flow of migrants and refugees," French Interior Minister Bernard Cazeneuve said in a letter to the European Commission. 

"The checks of travel documents presented by refugees at the external borders of the EU are an extremely significant and worrying issue," Cazeneuve added.