A shopping centre explosion in the home country of the Boston marathon bombers has killed two people.
The blast came in a busy area of Makhachkala, capital city of the Russian republic of Dagestan, and several other people were injured.
Dagestan is plagued by Islamic insurgents who frequently mount small attacks on police.
The republic is home to the parents of the suspects in last month's Boston bombing. One of the suspects, who was killed in a shoot-out with Boston police, paid a long visit to Dagestan last year and investigators are probing whether he has contact with extremists there.