Four people were injured, one seriously, when a double-decker tour bus got stuck inside a tunnel under a Paris bridge, police and the bus company have said.
Dozens of police officers were seen around the bus as it backed out of the tunnel several hours after the accident.
Its top-level windscreen appeared smashed and what looked like a tent roof was collapsed.
The accident occurred shortly after noon as the Big Bus Tours bus travelled from the Place de la Concorde, a large square between the Tuileries Gardens and the Champs-Elysees, the police headquarters press office said.
Big Bus Tours said the bus had taken the tunnel on a road under the Alexandre III bridge, which spans the Seine River, because other routes were closed as Paris shows off its sporting ways in its bid to host the 2024 Olympic Games.
Traffic was off-limits in large areas of the city centre until midnight.