At least one person was killed and two injured after part of an apartment block collapsed in Russia.
Officials in the Siberian city of Mezhdurechensk said on May 31 that an unknown number of people might remain under the debris.
Rescue teams are working at the site.
Dozens of residents of the damaged apartment block were evacuated.
According to the authorities in Kemerovo Oblast, the incident might have been caused by reconstruction work inside a shop located on the building's first floor.
Local police launched investigations into "violation of safety regulations during construction and reconstruction works."
Mezhdurechensk is a city of more than 100,000 residents located in coal-rich Kemerovo Oblast in Russia's Southwestern Siberia.
Based on reporting by TASS and Interfax