The deaths were the first fatalities in the 15-year history of the race, which has become the second-biggest U.K. half marathon.
The two runners who died after the 13.1-mile (21-km) road race on Sunday were not identified. Media reports said about 25,000 people took part in the race, and the fatalities were men aged 25 and 32.
(Reporting by Gaurika Juneja; Editing by Cynthia Osterman)