The urban climber, known as Spiderman, is routinely arrested for climbing high structures without authorization, but has always been released without charges. The West Tower, whose structure was completed three months ago, will later be accompanied by a taller East Tower.
Mikhail Dvorkovich, an adviser to the board chairman of the Mirax Group company, which is overseeing the Federation Tower's construction in Moscow City, the capital's new business center, said there are no Russian laws against climbing buildings, and that in any case, Robert's climb had been coordinated with authorities.
He also said the policemen had showed no documents authorizing the arrest of the climber, and that no representative of the French embassy was present, even though Robert is a French national.
Moscow police released Robert after a brief conversation. The 45-year-old Frenchman said he was satisfied with the climb, but that some sections had proved difficult. He also said police had been polite, and released him as soon as the situation was explained.
Alain Robert has climbed several well-known skyscrapers worldwide, including the Eiffel Tower, the Twin Towers in Kuala Lumpur, and the Empire State Building in New York, as well as the world's tallest hotels and banks.