An explosion has occurred in a cafe in the Urals city of Perm, a local police source told RIA Novosti by phone on Saturday.
The blast occurred late on Friday. Casualties were reported.
"The blast occurred at 23:15 Moscow time [20:15 GMT]... According to preliminary reports, some were killed or injured, their number is being established," the source said.
He added that no fire followed the blast.
Firefighters, rescuers and doctors are working at the scene.
NIZHNY NOVGOROD, December 5 (RIA Novosti)