Malaysia missing plane search China ship 'picks up signal'
5 April 2014 Last updated at 14:21 BST
A Chinese ship searching for the missing Malaysia Airlines plane in the southern Indian Ocean has picked up a pulse signal, Chinese media say.
They say the signal has a frequency of 37.5kHz per second - the same as those emitted by the flight recorders.
Nick Childs talked to the BBC News Channel about the latest developments.