The incident occurred on Saturday and as a result of the blast, which was equivalent to 30 grams of TNT, two people were hospitalized with one other person receiving medical treatment at the scene.
"Unknown assailants threw a home-made explosive device, packed with nails and screws, threw the window of the house," the source said.
A criminal case has been launched and an investigation is underway.
Routine attacks by skinheads and far-right groups on foreigners and people with 'non-Slavic' features have been reported across Russia in recent years. Some of the worst cities for racist attacks are Moscow, St. Petersburg, and the central Russian city of Voronezh.
2008 has seen another rise in the number of attacks on people of Central Asian origin in Russia. In February, the Kyrgyz embassy in Moscow sent an official note of protest to Russia's Foreign Ministry, Interior Ministry and the Prosecutor General's Office protesting at the murders of at least four Kyrgyz nationals in Russia since the start of the year.
