Moscow (CNN) A building collapsed Saturday afternoon in St. Petersburg, Russia, a spokesman for the Russian Emergency Ministry told CNN.

The spokesman said earlier 86 people had been evacuated and there were 24 rescue unit teams working in the area. The ministry said later Saturday that rescue operations with dogs were complete.

"Nobody was found under the rubble and we don't have any reports of missing relatives," a spokesperson said.

Three floors of the building collapsed, the ministry said.

The spokesman said that the block belongs to the St. Petersburg Research University of Information Technologies, Mechanics and Optics.

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