And as TruthRevolt's Vijeta Uniyal reports, the government has no clue to their whereabouts, German newspapers report.

Putting a spin on the situation, a spokesman for the Interior Ministry told reporters that some of these migrants may have self-deported. Despite this wishful thinking, it is more likely that most of these illegal immigrants are still within the country and have simply gone underground.

The news comes as Germany faces an imported crime wave. This year, police registered a more than 50 percent rise in crimes committed by immigrants. Going by the prevalent trend of underreporting migrant crime in Germany, the actual figures may be much higher.

Not just the law enforcement, but the German judiciary, too, has been clogged by asylum seekers. Courts are struggling to deal with the wave of cases filed by the migrants appealing the rejection of their asylum application. "The number of asylum cases being dealt with by German courts has risen by almost 500 percent in the past year," reported the German public broadcaster Deutsche Welle.