An otherwise healthy 26-year-old man died after falling to the ground on the finishing straight near Zinkensdamm, Dagens Nyheter reports.
A man in his fifties died of a suspected heart attack after collapsing on the hill leading up to Sofia Church.
“A man was brought in to us but he was already dead by the time the ambulance arrived,” Helen Hellströmer, spokeswoman for Stockholm South General Hospital, told newspaper Expressen.
The annual race was held in the capital in unusually hot and humid conditions.
“We’ve had a lot of people coming in to be treated for leg muscle injuries and dehydration,” said Hellströmer.
More than 20,000 participants took part in this year’s event on the city Södermalm island.