Subway entrance closed over rogue step

The entrance to a subway station in New York has been closed - because one of the steps is a fraction higher than the others.

Dean Peterson noticed the irregularity after repeatedly tripping on the same step at 36 Street subway station, in Sunset Park, Brooklyn.

He decided to set up a camera to see how many other passengers did the same and transport chiefs acted after he posted the footage on YouTube.

"My girlfriend and I would walk up all the time, and we would always trip," he explained.

"We just thought we were kind of klutzy. But then I kind of noticed that other people were doing it, too."

In the clip, uploaded on YouTube, he explains: "The subway station I use every day has something very peculiar about it... something that makes it unique from any other station in the city.

"One of the stairs is a fraction of an inch higher than all the others, making it just high enough so that everyone trips on it."

New York's Metropolitan Transportation Authority has closed the station entrance to investigate the offensive step.