Guernsey Police revealed that the search is focused on a scenario whereby those on board made it to a life raft after landing on water, although other theoretical outcomes are also being considered.
Nantes' Coupe de France fixture against Entente SSG, which was set to be played on Wednesday, has been postponed.
As of 5 pm on Tuesday, search and rescue operations were suspended due to the poor light.More news: National Football League investigates reports of laser pointed at Tom Brady during Chiefs game
Cardiff's statement came after the French Civil Aviation Authority's confirmation that Sala was on board the plane.
"Coming to Emiliano's case, the authorities stated that they have searched for 1,155 square miles and did spot some floating objects on water, but weren't able to confirm if they were from the missing plane". "The sea temperatures are very, very cold and just sap the core temperature of anybody in the water very, very quickly". The plane then lost contact while at 2,300 feet and disappeared off the radar.
Sala, 28, who had been at Nantes since 2016 and had scored 12 league goals this season, had signed a three-and-a-half-year contract with relegation-threatened Cardiff subject to receiving global clearance.
When his move to Cardiff was announced, he said: "It gives me great pleasure and I can't wait to start training, meet my new teammates and get down to work".