WASHINGTON, DC -- U.S. Customs and Border Protection officers have arrested a Nigerian woman for allegedly trying to smuggle nearly 5-pounds of heroin in her stomach.

Bola Adebisi, 52, arrived at Dulles Airport from Nigeria on Wednesday.

During a routine patdown, a female officer noticed that Adebisi’s stomach was abnormally rigid and ordered an X-ray at a local hospital.

The x-ray revealed 180 thumb-sized pellets of heroin, amounting to four pounds, 12 ounces.

Adebisi remained in the hospital until Saturday night, when X-rays confirmed she'd passed all the pellets.

At that time she was arrested.

Adebisi will be prosecuted by the U.S. Attorney’s Office for the Eastern District of Virginia.

The seizure sets a new record for internal drug smuggling.

The previous record was set last March by a 46-year-old Nigerian man who was arrested after expelling 100 pellets of heroin with a combined weight of a little more than four pounds.