Leicester - Leicester City's Thai billionaire boss was among five people killed when his helicopter crashed and burst into flames in the Premier League side's stadium car park moments after taking off from the pitch, the club said on Sunday.
A stream of fans already fearing the worst had laid out flowers, football scarves and Buddhist prayers outside the club's King Power stadium after Saturday's accident in tribute to Vichai Srivaddhanaprabha - the man they credit for an against-all-odds Premier League victory in 2016.
"The world has lost a great man," the club said in a statement.
"Leicester City was a family under his leadership. It is as a family that we will grieve his passing and maintain the pursuit of a vision for the club that is now his legacy," it said.
A book of condolence will be opened at the stadium from Tuesday and the team has postponed its upcoming League Cup fixture against Southampton.
"Everyone at the Club has been truly touched by the remarkable response of the football family, whose thoughtful messages of support and solidarity have been deeply appreciated at this difficult time," the statement said.
Police named the four other victims as Nursara Suknamai and Kaveporn Punpare, two members of Vichai's staff, pilot Eric Swaffer and passenger Izabela Roza Lechowicz.
Vichai, 60, the owner of Thailand's King Power duty-free empire, was a regular at matches who used to fly to and from home games.
The blue chopper took off from the middle of the pitch once the stadium had emptied after Saturday's 1-1 draw with West Ham.
Eyewitnesses said the helicopter appeared to develop a mechanical problem in its rear propeller shortly after takeoff.
Images showed orange balls of flame engulfing the wreckage in the car park of the stadium where just two years ago Leicester celebrated the most unlikely of Premier League title triumphs.
"Struggling to find the right words....but to me you are legend, an incredible man who had the biggest heart, the soul of Leicester City Football Club," Leicester striker Jamie Vardy, one of the heroes of that success, posted on Instagram.
"Thank you for everything you did for me, my family and our club. I will truly miss you.... may you rest in peace... #theboss"
Prayers and tributes poured in from the footballing world and beyond for the jovial man many credit with bringing glory to the central English city with the miracle-making club.
"He's put Leicester on the map," supporter Cathy Dann, 55, said.
"He's made us big," she said, as aviation experts picked through small pieces of wreckage scattered on the stadium's edge.
Among the tributes was an image of Ganesh - a Hindu god also seen in Thai Buddhist temples.
A minute's silence was observed before the whistle of Sunday's Premier League matches.
"It is a family business and they have instilled this sense of family not just throughout the club but into the city as well," Andrew Hulley, the team's chaplain for the past seven years, said.
, a former Leicester player who was hosting the BBC's Match of the Day when the accident happened, tweeted: "That was the most difficult @BBCMOTD I've ever hosted... A terrible tragedy. Heartbreaking."
And football fans in Bangkok said Vichai had helped develop the sport in Thailand as well, bringing the Southeast Asian country greater recognition in the sporting world.
"He is an important person who has raised the bar of Thai football further," Apichart Jitratkavee, a Leicester fan in the Thai capital, said.
Vichai bought Leicester City in 2010 and moved to chairman the following February, pouring millions into the team and becoming a beloved figure in the club and the city - a feat rarely achieved by the Premier League's foreign owners.
It was under Vichai's ownership that Leicester crafted one of the biggest fairytales in English football history by winning the 2015/16 Premier League, having started the season as 5 000-1 outsiders for the title.
Vichai's investments in the club helped return them to the Premier League from the second-tier Championship in 2014.
Languishing at the very bottom of the table for most of the 2014/15 season, the Foxes, as the team are nicknamed, then engineered what fans now fondly refer to as the "Great Escape", winning seven of their last nine matches.
They ended up finishing 14th, securing another season in Europe's richest league in 2015/16.
But not even their most devout fans could have imagined what happened next.
Vardy scored in 11 consecutive matches, propelling the men in blue to a title without parallel in Premier League history.
The success also qualified them for the first time for the lucrative Champions League, the pinnacle of European football, where they again defied the odds to reach the quarter-finals before losing to Atletico Madrid.
The impact made by Leicester's remarkable rise under Vichai across the continent was reflected as Spanish giants Barcelona and Real Madrid both expressed their condolences.
"The club wants to show their condolences to his family, his friends and all the Leicester fans," said European champions Madrid in a statement.
"Our thoughts are with the whole @lcfc family. Rest in peace," Barca posted on Twitter.