Russian President Vladimir Putin has ordered special Kremlin probes of three tragedies that have killed at least 175 people since Saturday.
A plane crash, a mining disaster and a retirement home fire in separate locations triggered Tuesday's presidential order. The tragedies have raised questions of lax enforcement of Russian safety standards and a shortage of emergency workers.
The probes come as rescue workers in the Kemerovo region of Siberia continue to recover bodies from the Ulyanovsk mine. The death toll stood at 106 on Tuesday, in what authorities say is the worst Russian mining disaster in a decade. Ninety-three miners have been rescued and four remained missing.
In Russia's far south, at least 62 pensioners perished early today, when fire swept through a nursing home near the Sea of Azov.
Authorities blame the high death toll in part on safety violations, toxic materials, negligence and the long distance from the nearest firehouse to the fire site.
Separately, seven people were killed and nearly 30 others hospitalized when an airliner overturned and broke apart on landing Saturday in Samara. Authorities say their crash probe is focusing on possible pilot error and bad weather at the airport.