Local sources said the incident happened after 10pm local time (4am BST).
Members of the public who were in the area aided police officers and rescue teams in the rescue efforts.
This is a breaking story. More updates to follow.
Eyewitnesses at the scene shared footage and photographs of the accident.
Videos posted on Twitter show a crowd of people watching on as rescue teams scramble to help those injured.
Two train carriages can be seen hanging over the rubble of the collapsed structure.
One man participating in the rescue efforts is pictured using an extension ladder to reach the window of one of the train cars.