Bomb kills two on Russian beach

A bomb explosion has killed two people on a beach in Russia's Black Sea resort of Sochi, police say.

Witnesses said a woman picked up a package which then blew up, killing her and a man with her. Four injured people were rushed to hospital.

The blast happened in Loo, in Sochi's Lazarevskoye district. The exact nature of the device is not yet clear.

Sochi is one of Russia's most popular beach resorts. It will also host the 2014 Winter Olympic Games.

The blast happened shortly after 1000 local time (0600 GMT). A police spokeswoman was quoted as saying there would have been more casualties if it had happened later, when the beach is more crowded.

One victim's leg was blown off.

Local officials evacuated people from the beach after the blast and investigators are now at the scene, trying to identify the device.

Sochi lies near Abkhazia, a breakaway region in Georgia where tensions have flared up recently. The volatile North Caucasus, where separatist rebels are active, also lies just east of Sochi.