this is bbc world news, the latest headlines... after days of frantic negotiations, a coalition of opposition parties signs an historic deal to form a new israeli government. 50 days before the start of the delayed toyko olympics around 10,000 volunteers have pulled out over coronavirus infection concerns. organisers insist the event can be held safely. a chemical—laden cargo ship is sinking off the west coast of sri lanka. it's sparked fears of an environmental disaster and has been labelled a "death blow" to the country's fishing industry. tanya dendrinos reports. a pristine coastline and a looming environmental disaster. the x—press pearl has been ablaze for two weeks,