An 8-month-old puppy and its owner had a frightening experience after the dog was reportedly stolen at knifepoint on a Chicago train.

The black-and-white puppy was in a pink carrier when it was reported stolen from its owner while aboard a CTA train, WGN reports.

Witnesses on the same train line reported that two men came aboard their car, trying to sell a puppy in a pink carrier for $500.

According to People, flight attendant Christopher Abair says he offered the man $100, which was all the cash he had available, but the man refused, saying the dog was a "special breed."

When there were no interested buyers, the man holding the puppy threw it to the ground, causing the puppy to yelp, and the men fled, according to witnesses.

Authorities are reviewing surveillance tape for more information on the suspects.