An American teenager is wanted after he was caught molesting at least two pregnant horses in Phuket, causing one of them to miscarry.

A couple who own a local stable complained to police on Tuesday, alleging an 18-year-old American tourist molested three mares.

Video from CCTV installed at the stable showed the teenager inserting his hand and arm into the sexual organs of the mares on different occasions during his visits, according to the couple.

The molestation is thought to have caused Mali, who was nine months pregnant, to miscarry.

The stable owner said the American teen appeared to be a normal visitor who often dropped by the stable. However, the couple noted the mares he visited had mucus around the openings of their sexual organs.

Local police have invited the American teenager, who is staying with his parents near the stable, for questioning on March 16.

The Department of Mental Health said the teen’s actions were a form of zoophilia — a mental disorder that requires psychiatric help.