A dramatic robbery attempt at a post office in Oberriet, Switzerland, has led to the arrest of two suspects.

On Monday evening, two men entered the back entrance of the post office, threatening and tying up a 19-year-old employee.

Their plan was thwarted when a third party intervened, causing the suspects to flee on a motorcycle without any stolen goods.

The St.

Gallen cantonal police have identified the suspects as a 22-year-old Swiss resident and a 40-year-old French national without a fixed address in Switzerland.

Both men are now in custody, with the St.

Gallen prosecutor's office seeking pre-trial detention.