An anonymous tipster in Houston called authorities after discovering a grown tiger inside a garage at an abandoned house on the city's southeast side Monday, according to news reports.

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The tipster told police he had gone to the house to smoke pot and said that, when he first noticed the tiger in a rickety cage in the garage, he thought he was hallucinating, KPRC-TV reported.

The tiger's cage was not locked and the garage was secured with just a screwdriver and a nylon strap, police told KPRC.

The tiger was tranquilized and removed from the house to a local animal shelter, but will be relocated to a permanent facility.

The Tiger Conservation Campaign says only 3,500 tigers of all subspecies of the big cat remain in the wild.