A 30-year-old woman died Sunday after collapsing one bend away from the finish line of the London Marathon.
Race organizers said the woman died at Birdcage Walk, less than a mile before the end of the 26.2 mile course.
"Although immediate medical attention was provided to the casualty, the fatality was confirmed this afternoon," the organizers said in a statement.
"We will not be releasing any further details of this tragic incident until next of kin have been notified and formal identification has taken place."
The woman was believed to be from the Harborough area in England's East Midlands, the Harborough Mail reported.
The death was the race's 10th since it began in 1981, and the first since a 22-year-old fitness instructor died in 2007, according to reports.
Kenyan Wilson Kipsang won the men's race Sunday with the second fastest time in the marathon's history to set down a marker ahead of the London Olympics.
Kipsang, who ran the second fastest time in marathon history last October, raced away from the pack to come home in 2:04:44, just outside the course record of 2:04:40 set last year by his countryman Emmanuel Mutai.
Martin Lel made it a Kenyan one-two after seeing off Ethiopia's Tsegaye Kebede in a dramatic sprint finish.
Kenya's Mary Keitany earlier streaked to victory in the women's race to retain her London title.
Her confirmed time of 2:18:37 was an African record and her personal best.
Edna Kiplagat finished second ahead of Priscah Jeptoo, who completed a Kenyan top three.
Sunday's races were held in near-perfect running temperatures, after predictions of highs of around 55 degrees Fahrenheit.
Organizers said that just more than 37,500 entrants registered for the race, which started in Greenwich, south London, at 9 a.m. local time, and finished within view of Buckingham Palace on The Mall.
