MOSCOW — At least 15 people are dead after a dam at a small Siberian gold mine collapsed and water flooded two workers’ dormitories on Saturday.

The Emergencies Ministry also said seven people were unaccounted for, Russian news reports said. The regional health ministry said 16 people were injured.

The collapse during heavy rain occurred around 6 a.m. near the village of Shchetinkino in the Krasnoyarsk region, about 2,100 miles east of Moscow.

The dam had not been registered or approved for use by Rostechnadzor, Russia’s agency for technological and ecological oversight, the Interfax news agency cited the agency as saying.