Ross Murray has been tweeting of "very relieved families" in Boston, where two explosions went off near the finish line of the Boston Marathon.
Murray, from Newcastle, ran the Boston Athletics Association Elite 1 mile race on Saturday - his first race since competing in the London 2012 Olympics.
The Olympic 1500m runner Ross Murray, who trains with the Gateshead Harriers, told Pam Royle and Ian Payne he nearly became a holiday rep before he was selected for Team GB - but when he goes to Rio de Janeiro it will be as an athlete, not a tourist.
Wallsend middle distance runner Ross Murray made a sensational Olympic debut in the men's 1500 metres.
His fourth placing in Round One at the Olympic Park tonight was enough to qualify for this weekend's semi final.
The Wallsend Harrier said he was overwhelmed by the occasion and the home crowd.
A successful junior athlete, Ross nearly gave up running altogether a few years ago to become a holiday rep after being plagued by illness and injury.
His next race is on Sunday.