the rescue operation has a sense of urgency with report from the xinhua newsagency in china to say that livers on the vessel heard shouts for help coming from inside the hull. if that is the case, it's a significant development, it suggested that there is at least an air pocket in there. passengers then will have survived. it's 12 hours since the vessel went dune. it's not known how long it will last for the water level inside if it's rising. that is the priority. the vessel is in shallow water, but is upturned. it seems the vessel sank within two minutes. it happened late at night in bad weather. most of the passengers were retirees aged between 50 and 80 and most of them it's fair to assume would be in the cabins and asleep. a little chance for the passengers to have escaped from the vessel >>> frightening to think about how many people have died. reports are that two of those that did survive are the captain and the chief engineer and they blame the tragedy on the weather? >> that's right. they are saying this was caused by some sort of cyclone, some sort of localized weather storm o