Brazilian Vanderlei de Lima was tonight involved in the first high-profile security breach of the Olympic Games as a spectator watching the men’s marathon accosted the long-time race leader.

Ireland's Alastair Cragg had a disappointing race in the men's 5000metres final, finishing 12th in a time of 13:43.06.

Twenty-four-year-old Alistair Cragg ran one of the races of his life as he came through his 5000m heat as a fastest loser, qualifying him for Saturday's 5000m final in just his first major track championship.

Ireland's former 5000m world champion Sonia O'Sullivan comfortably qualified for Saturday's final in a season's best time of 14 minutes 55.50secs.