Twenty seven have been killed and dozens more hurt in a head-on collision involving two passenger trains in southern Italy, officials say.
The two trains were on a single-track line at the time of the crash, between the coastal towns of Bari and Barletta.
The emergency services have been trying to free passengers from the shattered carriages, near the town of Andria.
One of those pulled from the wreckage was a small child, who was airlifted to hospital.
The local authorities have appealed for blood donors to come forward.
It was unclear what led to the collision, which happened in good weather at 11:30 local time (09:30 GMT) in the southern region of Puglia.
A local prosecutor in nearby Trani said it was too early to speculate on the cause, although human error was likely to have been a factor.
Italian reports said one of the trains had come from Andria, and the other from Corato, a short distance to the south-east. Both were travelling at high speed.
Both trains had four carriages and images from the fire service showed wreckage strewn across a large area. Some of the carriages were so badly damaged there was little left but debris.
Corato Mayor Massimo Mazzilli said the damage was so extensive it was as if a plane had crashed.
“I saw dead people, others who were begging for help, people crying. The worst scene of my life,” one policeman told journalists.
Rescuers set up a field hospital at the scene to help care for the large number of wounded passengers.
“The situation is dramatic,” Antonio Nunziante, from the local civil defence, told Ansa news agency.
In total, about 200 were involved in the rescue operation, working in temperatures up to 40C (104F).
Prime Minister Matteo Renzi interrupted a trip to Milan and returned to Rome, after ordering an investigation into the crash.
“I want to express my condolences to the families and I have ordered, with no holding-back, [an inquiry] to find who is responsible,” he said.

Source: BBC.com