EL PASO, Texas (Border Report) – Authorities in Juarez have arrested an American woman who crossed into Mexico from El Paso with $300,000 in undeclared cash.

Mexican National Guard members arrested the 43-year-old woman identified only as Lucia C.T. during a routine check of her vehicle at the Ysleta-Zaragoza International Bridge.

Soldiers rummaged through the black Toyota Rav4 and found multiple concealed stacks of $20 bills and a few stacks of $100 and $5 bills, a Mexican customs administrator told Border Report news partner ProVideo.

The woman allegedly contradicted herself when questioned and ultimately could not explain to whom the money belonged, the official said.

Lucia C.T. was arrested on charges of failing to declare currency over $10,000. She was turned over to the Mexican Attorney General’s Office in Juarez.

(ProVideo in Juarez, Mexico, contributed to this report.)