Runners will observe 30 seconds of silence before the London Marathon. Many will wear a black ribbon in memory of those who died and in solidarity with the more than 170 wounded in the Boston Marathon bombings.
Russian sports officials said Tuesday they will beef up security at sports events and the Sochi 2014 Winter Games in the wake of deadly explosions at Boston's marathon that killed three people, and injured over 140 others.
Thousands of people braved heavy rain and lengthy security checks to attend the funeral of Olympic marathon champion Samuel Wanjiru on Saturday following weeks of legal wrangling amid an ongoing investigation into his death.
Brazilian sports officials blamed inadequate course security for a defrocked priest's bizarre attack on the Olympic marathon leader, and said Monday they will appeal to world track authorities for a duplicate gold medal.