A man climbed to the top levels of a skyscraper in downtown San Francisco Monday and was taken into custody after he attached a flag to the side of the building.

The climber has not yet been identified, but a spokesman with the San Francisco Police Department said he was in his 50s.

Footage of the ascent on CNN showed the man using what appeared to be suction cups to ascend the exterior glass of the structure, Millenium Tower.

The charges against the man, if any, will be determined after an investigation into the incident that shut down portions of portions of Mission Street in the city, the police said.