At least four people are dead after a suspected gas explosion caused part of an apartment building to collapse in southern Russia Monday.
The governor of the region said 68 of the 120 residents who live in the 10-story building in Magnitogorsk are missing.
Reuters reports that gas explosions occur frequently in Russia, were older buildings haven't undergone the latest infrastructure updates and aren't outfitted with the necessary safety requirements. The apartment building complex was reportedly built in 1973.
Hundreds of search and rescue personnel were still looking for survivors Monday afternoon local time.
President Vladimir Putin sent both his health and emergency situations ministers to the area to oversee the rescue efforts.
Additional reporting from Newsy affiliate CNN.