After the race, Goolaert's Veranda's Willems-Crelan team posted on Twitter, "No update on Michael Goolaerts yet".
'He passed away on Sunday evening at 22.40 in Lille Hospital in the presence of his family members and loved ones, who we keep in our thoughts.
Goolaerts had been airlifted to hospital after collapsing about 150 kilometers (93 miles) from the finish. He was then attended by a medical team and appeared to receive CPR.
Goolaerts has been a key domestique for cyclocross world champion Wout van Aert through his inaugural spring classics campaign.
He has been in superb form this season - placing ninth at Dwars dooor Vlaanderern and 20th at both Driedaagse De Panne and Kuuren-Brussel-Kuurne.
The Paris-Roubaix classic was won by Slovakian cyclist Peter Sagan.
Unfortunately, 22-year-old Belgian cyclist Michael Goolaerts fell victim to these incredibly hard circumstances during this afternoon's race.
"I didn't feel that strong actually, I just felt the others wouldn't work together and that it was the right moment", he said of his break.
Paris-Roubaix is one of the five Monument classics along with Milan-San Remo, the Tour of Flanders, Liege-Bastogne-Liege and the Tour of Lombardy.
The race was also marred by several crashes that ended the hopes of outsiders Sebastian Langeveld and Matteo Trentin close to the Trouee d'Arenberg sector. He was 23 years old.
"It's really nice to win this race with the world champion jersey".
"It's very good for my career, when I was younger I dreamed of winning this race". "I've done my best", Sagan said.
I think Paris-Roubaix has to be the toughest race because you have the terrain - there are anything between 52 and 55 kilometres of cobbles over the course of around 260 kilometres.