NEW YORK (CNN) -- For the third time in recent weeks, a man climbed up the side of the 52-story New York Times building in New York early Wednesday.
The man was first spotted around 1:20 a.m., police said.
By 2:10 a.m., he had made it to the 11th floor, where he unfurled a banner that read "Bin Laden's Plan." It featured a picture of Osama bin Laden holding President George W. Bush from puppet strings.
"We are trying to ascertain how he got up the building," said New York Times spokeswoman Catherine Mathis.
The climber remained on a ledge on the 11th floor for about two hours, police said. 
Watch the man chat on his mobile phone »
In June, two men climbed to the top of the building. Both were subsequently taken into police custody.
All About The New York Times Company • George W. Bush • Osama bin Laden
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