"IOM applauds any effort to raise safety levels at international borders. We feel countries must emphasize the protection of their borders, but at the same time we urge everyone to be mindful of the protection of migrants as well. No one should be kept in squalor, and conditions without dignity simply because they seek a better life," Millman said.
Calais has seen thousands of attempts by refugees to cross the Channel Tunnel to England in recent weeks. The attempts have resulted in several migrant deaths and heavy traffic disruption.
An estimated 3,500-5,000 migrants, whose ultimate destination is stated to be Britain, are currently living in makeshift outdoor camps in Calais.