A woman is at the centre of a police inquiry into animal porn -- allegedly involving a pet dog.

The Strabane woman, who is in her late teens, was arrested last week after vile mobile phone footage was unearthed by police.

The film -- described to Sunday Life as "home made animal porn" -- involves a female and a dog engaging in a sex act.

She was arrested following raids at a house in the Fountain Street area on Sunday and Thursday.

The teenager was taken to Strand Road PSNI Station, Londonderry, where she was later released.

It is still unclear whether any charges have been brought against anyone in the bizarre investigation.

Strabane Sinn Féin councillor Jay McCauley - who is from the Fountain area - also declined to comment on the inquiry.

He said: "I understand police are investigating this matter so it would be inappropriate for me to comment."

But one shocked local told Sunday Life: "Everyone in Strabane is stunned by this -- it's the talk of the town.

"The family of the girl involved are well known and very upset over the whole thing.

"They are just as shocked as everyone else."

The raids are also thought to involve the discovery of a firearm image on one of the seized mobiles.

A PSNI spokesperson confirmed a property in the Fountain Street area had been searched "as part of an ongoing investigation."

Belfast Telegraph