Two passenger buses in Rome have caught fire, one of which exploded, bringing the total number of vehicles destroyed in the Italian capital this year to 10.
The latest blazes, on Tuesday, are believed to have been caused by mechanical problems.
Both drivers managed to escape with their passengers unscathed, although a woman who worked in a shop near one of the buses suffered minor burns.
The number 63 bus came to a halt near the Trevi Fountain, a popular tourist attraction, before the fire took hold.
Video showed flames from the vehicle, owned by Rome's transport authority, Atac, shooting into the sky and the facades of the two nearest buildings were left smeared with black soot.
Less than four hours later an Atac school bus caught fire in a southern suburb.
Politicians were quick to blame Mayor Virginia Raggi and her party, the anti-establishment Five Star Movement, for the series of fires, saying it showed they were incapable of governing Rome.
"Romans risk getting hurt every day with this 5-Star administration," said Barbara Saltamartini, a member of the far-right League party.
"These images are being seen around the world and they are the latest images of Raggi's failure."
Some 20 buses operated by the company caught fire in 2017.
Five Star says it inherited a transport system that was mired in debt and dragged down by poor management and that it is working hard to overcome numerous long-standing problems.
The fires became such a common occurrence that a regular hashtag, #Flambus, would trend after each incident.
Italian media blamed the succession of blazes on an ageing fleet and poor maintenance from Atac.
The company has suffocated under €1.3bn (£1.14bn) of debts and should declare bankruptcy, according to the former head of the company.
Around a third of the company's buses are in garages because they have broken down or are undergoing maintenance, according to an internal Atac report.
