In Russia, at least 10 people were injured in an explosion at a supermarket in Saint Petersburg.<br/><br/>Investigative Committee spokeswoman Svetlana Petrenko said, <br/>the blast was caused by a homemade device containing 200 grams of explosives at a storage area for customers' bags. She said, the injured have been hospitalised and an investigation has been launched to look into all possible causes of the explosion.<br/><br/>Police said, all shoppers have been evacuated from the supermarket located in the city's northwest Kalininsky district.<br/>