The death toll from the Lisbon streetcar crash rose to 17 after two more victims died in hospital, while 21 others, including a 3-year-old child, were injured.

The victims represented a range of nationalities, highlighting the streetcar’s popularity with tourists during the busy summer season.

Authorities have not confirmed the cause of the derailment, and investigations are ongoing, with forensic teams working overnight on autopsies and detectives documenting the wreckage, the Associated Press has reported.

The crash prompted a national day of mourning in Portugal, suspension of other historic streetcar operations in the city, and condolences from government officials and EU leaders, as Lisbon grapples with one of its deadliest recent tragedies.