(CNN) — Border patrol agents are used to seeing many strange things on the US-Mexico border.

However, when they came across an abandoned black duffel bag Monday, they had to do a double take.

While on duty, the agents saw three people attempting to enter the United States illegally, through Brownsville, Texas.

Border patrol agents found an abandoned duffel bag with a tiger cub inside it on the US-Mexico border. (Credit: US Customs and Border Protection)

The men dropped the bag as they fled back to Mexico.

When agents approached, they found an unconscious male tiger stuffed inside.

The nearly four-month-old cub appeared sedated and was turned over to the Gladys Porter Zoo.

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