- At least 150 people have died in the flooding, government officials say
- A day of mourning is declared by the regional governor
- Officials attribute the death toll to flooding that struck while people were asleep
Moscow (CNN) -- At least 150 people have died in flooding in southern Russia's Krasnodar region, state-run media reported Sunday, citing Russia's interior ministry.
Of those killed, 139 are in the Krymsk district, nine in Gelendzhik district and two in the Black Sea port of Novorossiisk, the ministry said.
The death toll, according to reports by Russia's state news agency Itar-Tass, has climbed steadily as floodwaters have receded, allowing police to find more bodies in flooded buildings in Krymsk, a predominantly rural area dotted with one-story homes.
Regional Gov. Alexander Tkachev declared Monday a day of mourning, ordering the cancellation of any planned celebrations or leisure activities, according to a statement released by the governor's press office.
Heavy rains that began Friday spawned the floodwaters, which rose 7 meters (23 feet) overnight in Krymsk, flooding homes while most people were asleep, the news agency said. Others were rescued by police after seeking refuge on roofs and in trees, it said.
Television footage from the Krasnodar region showed flooded streets, stranded vehicles and people wading through torrents of knee-deep muddy water outside homes.
The state-run Ria Novosti news agency said dozens of passenger trains have been diverted in the region as the water level remains 19 inches above the tracks.
Krasnodar also suffered deadly flooding in October 2010, when torrential rains in mountainous areas caused rivers to overflow, flooding villages nearby.
CNN's Arkady Irshenko contributed to this report.
