Missing Malaysia Airlines plane: China steps up airport security
8 March 2014 Last updated at 18:29 GMT
Chinese authorities have stepped up security at the country's airports, following the disappearance of a plane travelling from Kuala Lumpur to Beijing.
Malaysia Airlines flight MH370 disappeared at 02:40 local time on Saturday (18:40 GMT on Friday) with 239 people on board.
The BBC's John Sudworth, who is in Beijing, says some Chinese media reports have criticised the delay in the informing relatives that the plane had gone missing.