At least 100 people are now reported to have died in the Ebola outbreak in the Democratic Republic of Congo, which has been declared an international emergency by the World Health Organization. Hundreds more cases are suspected, and six Americans have been exposed. While the risk this poses outside east Africa is small, the outbreak presents some real challenges. Our correspondents say there's no vaccine, and that it's occurring in a conflict zone partly controlled by rebels. Our explainer gives you the full picture: including how the outbreak started, how it's different and why stopping it will be so difficult.

Two women have told the BBC they were raped during the filming of a major UK reality TV show, Married at First Sight UK, while a third has described an allegation of a non-consensual sex act. The show did not do enough to protect them, they all said - the men deny all the allegations. Broadcaster Channel 4 was aware of some allegations before broadcast, and it's removed all episodes from streaming and linear services, alongside the show's social channels.