Kimetto races to Chicago marathon victory

Taking advantage of ideal conditions, Kimetto covered the 42.195 kms in a time of two hours three minutes 45 seconds to shatter the course record of 2.04:38 set last year by Ethiopia's Tsegaye Kebede.

Kimetto was on world record pace throughout the final kilometres while Mutai crossed eight seconds, also smashing the old course record in 2:03.53.

Security was increased for the race, which attracted 40,000 runners, after the Boston marathon bombings in April which killed three people.

(Reporting by Steve Keating in Toronto; Editing by John Mehaffey)