At least 20 people have been killed after two trains collided head-on in southern Italy.

Dozens of other passengers were injured, some seriously, in the crash near the town of Andria.

One official appealed for blood donations and said: "There could still be someone in the wreckage."

Image: The passenger trains collided on a single stretch of track

The four-carriage passenger trains, thought to be mainly carrying commuters, collided in the middle of an olive grove in the Puglia region of Italy.

The accident happened on a single stretch of track between the towns of Corato and Andria.


Rescue Workers Search For Survivors

Rescue workers pulled victims from the wreckage, including a small child who was alive.

The daughter of one of the passengers went to the scene of the crash to try and find her father.

"We hope he is alive," she said. "Because at the moment we have no news. This kind of thing shouldn't happen.

"My dad was on this train, he was supposed to be on this train, and at the hospital they don't know anything so we'll have to see what will happen. But at the hospital they have no news.

"I just want to stay calm and remain positive. I have no news."

Image: Rescue workers trying to get inside the badly damaged carriages

Local police chief Riccardo Zingaro said: "Some of the cars are completely crumpled and the rescuers are extracting people from the metal, many of them injured."

The Mayor of Corato, Massimo Mazzilli, said the scene was horrific and the rescue work was ongoing with firefighters, civil protection officials and volunteers.

He said workers had just pulled out a passenger alive and were poised to rescue a second one.

On his Facebook page, he wrote: "It's as disaster, as if an airplane fell. Rescue workers and civil protection is on the scene, but unfortunately there are victims!"

Image: The crash occurred between the towns of Corato and Andria

An aerial image showed train carriages derailed and badly damaged by the collision, with debris spread out on either side of the track.

Italian Prime Minister Matteo Renzi said the train crash "is a moment of tears".

Image: Several people have been pulled out alive

He has cut short a visit to Milan in the north of the country following the accident.

"We won't stop until we get a clear explanation over what happened," he told reporters.