About slapping a female reporter. I deeply regret the comments i made. Thats certainly not the person who i am. And why china is experiencing a baby boom, driven partly by older mothers. Coming up in sportsday later in the hour on bbc news a vote of confidence over three months before the start of the womens european championship, england name theirfinal squad. Good evening. At least ten people have died in a suspected Suicide Bombing on the metro system in st petersburg. President putin, who was in the city at the time, said all causes, including terrorism, were being investigated. The explosion happened in a Train Carriage as it travelled between two stations. Within minutes the entire network was closed and police later found and defused a device at another station. Our correspondent, steve rosenberg, is in St Petersberg with the latest. 2 Million People use the Saint Petersburg metro every day. This city relies on this underground. Earlier today metro train left the station behind