St. Petersburg, Russia: Several floors of a university building in Russia’s second-largest city, St. Petersburg collapsed on Saturday evening, as per reports by Associated Press. No immediate reports on casualties are known.Also Read - Ukrainian President Volodymyr Zelenskyy Announces Lyman ‘Fully Cleared’ Of Russian Forces

The cause of the collapse is not clear. The floors of the Saint Petersburg National Research University of Information Technologies, Mechanics and Optics crumbled without a warning. Reportedly, there may have been students in the building for elective weekend instruction. Also Read - Russian Troops Withdraw From Lyman After Ukrainian Forces Encircle Key City

The school, popularly known as ITMO University, is one of Russia’s National Research Universities. Also Read - Annexation of Ukrainian Regions: Why India Abstained on UN Vote Against Russia?