Grozny became the administrative center of Grozny Oblast of the Russian SFSR, and the city at the time was again wholly Russian. In 1957, the Chechen-Ingush ASSR was restored, and the Chechens were allowed to return. The return of the Chechens to Grozny, which had been lacking of Nakh for thirteen years, would cause massive disruptions to the social, economic and political systems of what had been a Russian city for the period until their return. This caused a self-feeding cycle of ethnic conflict between the two groups, both believing the other's presence in the city was illegitimate. Once again migration of non-Russians into Grozny continued whilst the ethnic Russian population, in turn, moved to other parts of the USSR, notably the Baltic states, after inter-ethnic conflict broke out briefly in 1958.