Country superstar Willie Nelson was arrested Friday morning for alleged marijuana possession, reports. The musician was stopped at a Border Patrol checkpoint and reportedly found with six ounces of marijuana.

Hudspeth County Sheriff Arvin West told KVIA that Nelson was traveling in his tour bus from California to Austin when he was stopped by Border Patrol agents Friday morning around 9am. An officer smelled pot when a door was opened and decided to search the bus, the Associated Press reports. Nelson was one of three people arrested.

Nelson was booked at the Hudspeth County jail on a $2,500 bond--which the singer quickly posted. He's since been released.

Nelson's rep, Elaine Schock, declined to comment.