According to him, more than 70 people may still remain under the shambles.
Several versions of the accident are being considered now, with an explosion of communal gas being the principal of them.
A team of rescue workers, including dog handlers, is preparing to fly from St. Petersburg to Arkhangelsk.
The report about the collapse of the fifth section of a nine-storey six-section panel dwelling house in the Cosmonauts Street in Arkhangelsk came at 3.25 A.M. Moscow time.
All operational services of the city are working at the scene of the accident. (ark/yon)