As CCTV images are released of the suspects for last week's Boston marathon attack, organisers of Virgin London marathon have announced that for every finisher in Sunday's race they will donate £2 to victims of the bombing. The pledge will mean an estimated £70,000 going towards One Stop Boston to help the people affected rebuild their lives.
This weekend's event in London is expected to be a more sombre occasion than the usual full-on celebration in respect of last week's tragedies. Each runner will wear a black ribbon and there will be a moment's silence on the start line in Blackheath before the race gets underway.
The star attraction is double Olympic champion and hometown boy Mo Farah, who will run to the halfway point in preparation for his step up to the full distance next year.
Farah said: "It's sad news what happened in Boston and my support goes to all the people and families. Those people would want us to carry on and do the best that we can."