The Eiffel Tower in Paris had to be evacuated on Monday after a man tried to scale it.
Police and other emergency workers including firefighters in the French capital were immediately scrambled to the 900 feet structure, which has just celebrated its 130th anniversary.
The man could be seen dangling just below the third and highest level of the structure.
It was not immediately clear how the trespasser managed to get past the tower’s stringent security system.
A Paris police spokeswoman said a team of firefighters, including a climbing specialist, were at the scene and in touch with the intruder, whose motivations remained unclear.
Officials did not immediately provide further information about the incident.
It is not the first time someone has attempted to climb the Eiffel Tower. In 2015 a British freerunner, James Kingston, climbed it without safety ropes and without permission, dodging security cameras as he went.
The tower is the tallest structure in Paris, at 324 metres (1,063ft), roughly the same height as an 81-storey building.