The head of the Titanic submersible rescue mission has revealed that search crews are concentrating on "banging" noises detected on sonar - which could indicate there is a chance of "survival".
Rear Admiral John Mauger, from the US Coast Guard, said his team "don't know" the source of the noise but have passed on their data to the US navy. The sounds was picked up by a Canadian P-3 aircraft and underwater operations are being carried out in order to pinpoint their origin, the Mirror reports.
According to the US Coast Guard, the noises were identified in the area that is currently being searched for the missing submersible. The vessel - which is owned and run by OceanGate Expeditions - lost communication less than two hours into its journey to the Titanic wreckage site on Sunday.
