1 May 2012 Last updated at 14:24

Steve Parry pays tribute to Alexander Dale Oen

British Olympic medallist Steve Parry has expressed his shock at hearing the news of the death of world swimming champion Alexander Dale Oen.

The 26-year-old died suddenly in the United States.

In July 2011, Dale Oen won gold medal in the 100m breaststroke at the Fina World Championships in Shanghai.