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A teenage girl has been arrested after allegedly filming herself torturing and killing animals then posting the sickening footage online.

Alina Orlova was held in the Russian city of Vladivostok where she was waiting for a connecting flight between her home in Khabarovsk to St Petersburg.

The 17-year-old and pal, identified only as Kristina K., are accused of posting photographs and videos of themselves torturing and killing cats and dogs for "bloodlust".

The horrific images show one dog nailed to a wall as if it had been crucified and another hanging by its collar and then shot with an air gun.

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Other animals are seen dead - including one which the girls apparently cut open to pull out its internal organs.

(Image: CEN)

Outraged social media users alerted police after the graphic images were posed online and local residents started a petition calling on the authorities to act.

Both girls are students and live in the city of Khabarovsk in south-eastern Russia's Khabarovsk Krai region.

They allegedly adopted unwanted animals, promising to look after them but instead tortured and killed them, posting photographic evidence online.

(Image: CEN)

In one image, Orlova is seen clutching a cute puppy with her mouth open wide as if she is about to bite it.

Another picture shows Kristina menacingly holding a hammer and a nail.

(Image: CEN)

Social media user Dmitriy Dmitriev said: "Somebody should do the same to them, in the same manner they treat these animals."

Maria Ivanov added: "OMG, I feel so bad after seeing it. One of the dogs that is still alive looks so adorable on the photo and is already hanging dead on the other one.

"How can their mothers defend it. I would have probably reported on my child if he did something like that. Horrible."

Orlova also allegedly wrote online that she was planning to kill her own mother, asking people how long she would have to stay in prison if she was caught.

Kristina's family are believed to have close ties to the local police force in Khabarovsk, according to local media.

Khabarovsk, the administrative centre of Khabarovsk Krai, lies just 18 miles from the Chinese border, at the confluence of the Amur and Ussuri Rivers.