At least 16 people have been killed after a suicide bomber detonated explosives in the entrance hall of a Russian train station, Reuters reported, citing investigators.
Authorities said the attacker detonated a shrapnel-filled bomb in front of a metal detector just inside the main entrance of the station in Volgograd, a busy hub in southern Russia.
It marks the second deadly attack within three days as Russia prepares to host the Winter Olympics in Sochi.
ITV News correspondent Neil Connery reports:
More top news
Pro-Leave campaigner Boris Johnson has responded in a politely worded letter to Jean-Claude Juncker's invitation to "come back to Brussels".
The Friends star had reportedly not seen her mother for several years following a feud - but reconnected with her shortly before she died.
A deal is believed to have been reached with official confirmation likely on Friday.