A veteran runner from East Wittering is believed to have been taking part in the Boston Marathon, which was hit by two bomb blasts.
Nick Bailey, who has completed more than 100 marathons, posted on his Facebook page last week, saying he was headed to Boston to take part in the race.
“Flying off to America tomorrow to do the Boston Marathon this weekend,” he wrote on Thursday. “Looking forward to seeing my favourite restaurant in China Town. Good luck to all doing the Brighton Marathon and should see you at the London Marathon where my son is attempting his first Marathon.”
Three people have died and at least 140 people were injured in the two explosions near the end of the city’s course.
On his website, which you can see here http://www.wildtortoise.co.uk/wildtortoise/Welcome.html, Mr Bailey wrote: “I have two goals for 2013. One is for the Boston Marathon in April and the second is to once again ascend Everest in November and run its marathon.”