Four runners were taken from the Oklahoma City Memorial Marathon track to local hospitals by paramedics as of 1 p.m. Sunday, Emergency Management Services Authority spokeswoman said.
One man in his 30's was taken in serious condition, while the other three were taken in good condition, EMSA spokeswoman Lara O'Leary said.
The man in his 30's, a runner in one of the races, was taken to St. Anthony's Hospital, according to a race official.
All together, 27 people at the marathon called for medical assistance, with 14 being treated by emergency medical crews at the medical tent and nine not requiring medical care once paramedics made contact, O'Leary said.
No names were released Sunday afternoon.