At least 7 people, including 4 children, were injured as a result of swimming pool`s roof collapse in Chusovoi town of Permsky krai. As press-service of Russian Ministry of Emergency has informed, incident took place at 13:00 by Moscow time. By tentative data 13 people were inside of the building. 2 children are in severe condition. Rescuers clear obstructions at present moment. Total area of collapse amounted to 100 sq. meters - 70% of roofing. Swimming pool was built from concrete structure. Rescuers and operative group of Head administration of Russian Emergency Ministry over Permsky krai departed to place of occurrence from Perm.