"More than a hundred illegal foreigners were detained by police in a flat in Moscow," the service said. "Most of them are from Armenia and Kyrgyzstan, and are in breach of rules governing the stay of foreign citizens in Russia".
This raid was part of a recent campaign to tackle illegal migration in Russia, which is suffering from an illegal "migration boom" mainly by those from former-Soviet republics arriving in Moscow and other major cities in search of work.
According to the Federal Migration Service, over 20 million people come to Russia every year and half are in the country illegally.
In January, Russia toughened its migration policy, reducing to 40% of the total workforce the number of migrants allowed to work in markets.
From April 1, 2007, migrants will be banned from working in markets entirely, a move designed to bring order to the sector and curb a wave of ethnically motivated crimes in the country.
Some one and a half million civil cases were filed for violations of migration laws in 2005, and approximately 57,000 illegal immigrants were deported.
