A female train guard lost her job after filming X-rated videos inside a train at night.

The woman, identified as Teresa W, filmed the 'adult videos' and then shared them on a porn site.

In one of the videos, Teresa poses as a dominatrix in her uniform. She then punishes a male 'passenger' who had dodged his fares.

She says in the footage:

"So, my little friend, I've caught you.

Now I'll show you what I do with passengers who haven't paid their fares. Pull your trousers down. I want to see your naked a***!"

She then raises a whip at the fare-dodger.

In another video, Teresa invites a man into the driver's cab to film an erotic scene.

When the videos surfaced online, however, Teresa insisted the videos were a 'private affair.' Therefore, she didn't need any permission from her employer.

However, after investigation, the German railway company DB fired her.

According to reports, Teresa filmed the videos on regional trains in Saxony-Anhalt in eastern Germany.

She then posted the films on a porn site with titles such as: 'Fare dodger caught on Lady Ashley's train.'

Following her firing, a spokeswoman for the DB said:

"The worker in question is no longer [an employee of our company] since the [videos surfaced].

We do not tolerate her alleged behavior in any way and condemn it in the strongest terms.

It is not allowed for DB employees to use work clothes, equipment, or room space for private or commercial purposes.

We are investigating the facts of the case and examining further steps."

Meanwhile, in the UK, train passengers recently had a bit of a shock when 'porn sounds' played out over the train's public address system.

As the sound started playing, one passenger began filming the inside on the train, recording the sounds.

In the footage, as the moaning and groaning grow across the train, the passengers start giggling.

Commenting on the incident, the railway spokesperson said at the time:

"[The] railway has a policy of blocking inappropriate material, including porno sites, on its onboard and station WiFi services.

We are investigating this incident to establish how this material is broadcast on our service.

The incident is wholly unacceptable, and we apologize to customers."