An american survived from Niagara Falls

An American man survived a fall over Niagara's Horseshoe Falls and became just the second person to live through an unaided and intentional plunge over the massive cataract, Canadian police said on Wednesday.

Around mid-afternoon, police said they received a call from a tourist who saw a man climb over a retaining wall and jump into the Niagara River before being swept over the roaring 51-metre (170-foot) waterfall.

"All indications at this point in the investigation lead us to believe that he did so on of his own accord and it was of that nature," said a spokesman for the Niagara Parks Police.

The man was being treated in a Niagara Falls, Ontario, hospital and police said an investigation was under way.