A video was uploaded on February 9 described as showing the inside of one of two trains that crashed head-on in Bavaria earlier that day, killing several people and injuring scores more. The footage shows the interior of a train broken up, with passengers, some trapped under debris, injured and wailing in distress. The trains crashed head-on at speed in the early morning, with police reporting at least nine fatalities and up to 100 people injured. The crash took place near the town of Bad Aibling and emergency services were at the scene shortly after. We are working to ascertain if this is the original version of this video. Credit: YouTube/Joe Adediron

WARNING: Disturbing video.

HARROWING video has emerged purporting to show the immediate aftermath of the horrific train crash in Germany which left at least 10 people dead and 81 injured.

The head-on collision occurred on a single-track rail near the Bavarian town of Bad Aibling, 60km south of Munich, at 7am Tuesday (5pm Tuesday AEDT).

Several carriages were overturned and one derailed after the trains slammed into each other on a curve without braking.

A video posted to YouTube purportedly shows passengers inside one of the carriages screaming and wailing in pain after being flung from their seats.

“I think it was the turn,” someone says, according to the UK Telegraph. “Are you serious?” another person replies.

“Maybe the signal changed,” someone else says.

“He saw the signal changed, s**t!” says another passenger. “The signal changed. Oh f**k!”

“The police are on their way,” a woman says. “Don’t be afraid.”

The footage was briefly posted online on Wednesday morning before being taken down.

BLACK BOXES RULE OUT TECHNICAL FAILURE

Information obtained from the first of three black boxes shows no indication of a technical failure, Transport Minister Alexander Dobrindt said.

Dobrindt explained the remaining two black boxes would have to be examined in order to draw conclusions as to the cause of the deadly crash.

Prosecutors and police are trying to determine why an automatic safety system designed to avoid head-on collisions failed to prevent the accident, allowing two commuter trains carrying a total of 150 people to collide at full speed on a single-track line.

Due to a curve in the track and the fact that the area was partially wooded, the drivers had no visibility before the two trains crashed into one another, causing several compartments to derail.

Deutsche Bahn said the safety system had been tested as recently as last week.

OFFICER ON DUTY QUESTIONED

Prosecutors say they are investigating the possibility of human error, technical failure or a combination of both.

Police spokesman Juergen Thalmeier said that the officer on duty had been questioned immediately after the accident and that there was “no urgent suspicion” against him, while the search for victims has been completed.

Emergency workers were removing the wreckage from the single-track line with the help of a large crane in an operation likely to last for two days.

Nine of 10 victims have been identified, Thalmeier said. They are all men aged between 24 and 60, and include two train drivers and a supervising train driver.