More than $400,000 worth of cocaine was discovered hidden in the nose of an American Airlines plane on Sunday.

The flight from Bogotá, Colombia, arrived in Miami on Sunday and the airliner was sent to American’s maintenance center at Tulsa International Airport.

A mechanic working on the nose gear called authorities after noticing what appeared to be a several bricklike objects, said Justin Green, spokesman for the Tulsa County Sheriff’s Office.

Investigators found seven bricks of cocaine totaling about 31 pounds. Authorities said the cocaine, valued at $14,000 a pound, was worth around $434,000.

The Drug Enforcement Administration in Miami was investigating.

This isn’t the first time cocaine has been found on an American plane. In 2015, a jet originating in Bogotá was brought to the Tulsa maintenance facility, where workers found 26.2 pounds of the drug.

The Associated Press contributed to this report.