A bridge partially collapsed in the eastern German city of Dresden early on Wednesday, with authorities saying that no one was injured but that there was a risk of further sections crumbling.
A roughly 100-metre (330-foot) section of the Carola Bridge, which connects Dresden's historic old town to other parts of the city, plunged into the Elbe river around 3:00 am (0100 GMT), the Dresden fire brigade said.
The bridge and the surrounding area were sealed off, causing major disruption to city traffic.
Officials warned that other parts of the bridge could yet come crashing down.
"There is still an acute danger to life and risk of collapse," fire brigade spokesman Michael Klahre said.
The German weather service (DWD) warned that storms in the next days could cause the level of the Elbe to rise, with authorities fearing this could cause further damage.
Nobody was on or under the bridge at the time of the incident.
The last tram had crossed the bridge at around 02:50 am, mere minutes before the collapse and narrowly avoiding catastrophe.
"I am very, very happy that based on what we know, no one was hurt," Klahre said at a press conference alongside other officials.
Police spokesman Thomas Geithner said officers who happened to be stationed just 50 metres away "described hearing a loud, heavy noise, the ground shook".
Rescue services and other experts were deployed at the scene to assess the damage and secure the bridge.
The cause of the collapse is still being investigated.
The concrete structure may have suffered from corrosion caused by chloride contamination in the past, Holger Kalbe, head of the bridges and civil engineering structures department for the city of Dresden, told reporters.
But he added that this was just a first "assumption" and experts would have more certainty on what happened in the coming days.
The part of the bridge that fell contained the section dedicated to tram lines and foot and cycling traffic. It was scheduled for maintenance work next year.
The other two sections of the bridge, for road vehicles, had already been renovated, Kalbe told reporters.
The partial collapse also damaged two major heating pipes, cutting off district heating in the city and temporarily leaving residents in some neighbourhoods without hot water, Klahre said.
Police said the partial collapse was being deemed an accident, and warned against spreading fake news on social media.
"There is zero indication" to suggest any criminal behaviour at this point, Geithner said.
On X, Saxony state police urged people not to share "any false reports" about the incident, adding that there "is no evidence so far of third-party interference".
The Carola Bridge, one of Dresden's main crossings, was constructed when the region was part of communist East Germany and completed in 1971. It is named after the wife of King Albert of Saxony.
Germany counts around 130,000 bridges, many of which were built decades ago when traffic was lighter.
Concerns have long been raised about the need for repairs and for more investment to modernise the ageing structures.
