A female suicide bomber is suspected of carrying out the attack on a bus in southern Russia, according to news agency Interfax citing Russian investigators.
More top news
The president of the world athletics body had faced repeated questions about a conflict of interests over the bid for the Eugene 2021 games.
Temperatures begin to slip away as the weekend approaches
George Osborne has managed to get what he wanted - less generous welfare payments and a clear incentive to encourage people back into work.