The latest police sweep of undocumented immigrants in the capital led to 404 arrests, police said on Friday.
Authorities said six of the detainees were arrested because they were not in possession of the proper residence papers.
The sweep on Thursday included a search of four properties and was carried out as part of an ongoing crackdown on illegal immigration which has been code-named Xenios Zeus.
According to the police, 54,086 migrants have been briefly detained since the start of the sweep operation. Of these 3,994 were charged with being in the country illegally.