European countries' "shameful" response to the migrant crisis and their efforts to counter the threat of attacks risk undermining their historic commitment to human rights, Amnesty International warned on Wednesday, according to AFP.

The London-based campaign group, traditionally more used to lambasting dictatorships for rights abuses, used its annual report to take some of the world's oldest democracies to task.

Several countries in the European Union's passport-free Schengen area have reimposed border controls in response to a huge wave of migrants and refugees fleeing war and persecution in the Middle East, Africa and South Asia.