London - Rescuers searched on Wednesday for a missing plane carrying Cardiff City's record new signing Emiliano Sala, as it emerged the Argentine striker had sent relatives a desperate message shortly before the light aircraft disappeared over the Channel.
Floating objects have been found in the water, and police on the British island of Guernsey, which sits off the north coast of France, have warned the chances of the passengers surviving were "slim".
As the air search resumed, Argentine media reported that Sala sent a final message before the plane disappeared from radar around 20km north of Guernsey on Monday night.
"I'm on a plane that looks like it's going to fall apart, and I'm leaving for Cardiff," the 28-year-old said in a rambling WhatsApp audio message.
"If in an hour and a half you have no news from me, I don't know if they will send people to look for me, because they will not find me, you know... I'm so scared," he added.
The player's mother, Mercedes, told Argentine television channel C5N that the plane belonged to Cardiff chairperson Mehmet Dalman, but he disputed the claim.
"I can say to you categorically that the plane had nothing to do with Cardiff City," he said.
Dalman said the club had offered to pay for his flight but Sala "made his own arrangements".
"I can't tell you who arranged the flight because I don't know."
Sala, who signed with the Premier League club on Saturday from French Ligue 1 club Nantes for a reported fee of €17 million, was flying to Cardiff on a single-engine Piper PA-46 Malibu aircraft.
A 15-hour search Tuesday covering 3 000 square-kilometres in the Channel spotted "a number of floating objects in the water", Guernsey police said.
Guernsey Coast Guard captain David Barker told AFP that the weather was expected to deteriorate later on Wednesday but added: "We'll certainly go until sunset today."
Their hopes rest in the possibility that the passengers are in a life raft, which has so far evaded detection.
In Sala's Argentine hometown of Progreso, his father Horacio told the press that as "the hours go by and I don't know anything, it makes me fear the worst".
Daniel Ribero, president of the San Martin Athletic Club in the town, told AFP: "These are hours of uncertainty, of much pain and much sadness, waiting for the good news that he is alive."
But one of the rescuers searching for the missing plane admitted they were "fearing the worst".
"The sea temperature is so cold at the moment," John Fitzgerald, chief officer of Channel Islands Air Search, told AFP.
Guernsey police said: "We have found no signs of those on board. If they did land on the water, the chances of survival are at this stage, unfortunately, slim."
The pilot had requested to lower his altitude shortly before air traffic control in neighbouring Jersey lost contact with the plane, they said.
French civil aviation authorities had confirmed Sala was on board. It is thought there was one other passenger on the aircraft.
Sala, who had been at Nantes since 2015 and had scored 13 goals in all competitions this season, had signed a three-and-a-half-year contract with relegation-threatened Cardiff subject to receiving international clearance.
Cardiff's executive director Ken Choo said they were all "very shocked" at the news, saying they had expected Sala to arrive on Monday evening ahead of his first day with the team on Tuesday.
"We continue to pray for positive news," he said.
Argentine football legend Diego Maradona said he was hoping the plane had simply gone astray.
"I hope it went to the wrong airport and we find him alive, that's all," he said in an audio message.
Cardiff called off Tuesday's training session, and stunned supporters laid flowers and scarves outside the club's stadium.
With his former team-mates in shock, Nantes have postponed their French Cup tie against third-tier side Entente Sannois Saint-Gratien on Wednesday until Sunday.
Hundreds of fans gathered for a vigil in the western French city on Tuesday, placing flowers, scarves and flags on a fountain and chanting the striker's name.
"I still have hope, he is a fighter," Nantes president Waldemar Kita tweeted.
His last post on Instagram showed him surrounded by Nantes players before leaving. "La ultima ciao (the last goodbye)," he wrote.
Sala began his career at Bordeaux in 2010 and had loan spells at other French clubs including Orleans, Niort and Caen.
He joined Nantes in 2015 for €1 million and had scored 42 Ligue 1 goals in three and a half seasons.