A car bomb has killed three people in southern Russia, according to officials. It is seen as a worrying development six weeks before the country hosts the Winter Olympics.
The blast happened at Pyatigorsk in the Russian Caucasus, some 270 kilometres from Sochi where the Games are to take place.
The city lies just north of a region which is host to a long-running Islamist insurgency, and where one Chechen warlord urged militants to stop the Olympics.
The blast badly damaged a traffic police building. The three victims were reportedly outside; it is not clear whether or not they were police officers.
A state of emergency has been declared in the city.