 And this is Andrew Peach on the BBC World Service. Welcome to the newsroom. In a moment, we'll hear about that dip in the River Seine to show it's clean enough to accommodate the Olympic Games in the next few weeks in Paris. First, let's hear more from Thai police about the circumstances behind the deaths of six people at an exclusive hotel in Bangkok. It's suspected they died from poisoning. Nopasin Punsawat is the deputy police chief of Bangkok and has been speaking at a news conference.