Actress Amanda Seyfried alerted airport security in America after she accidentally carried a Swiss Army knife onto a plane.
The 28-year-old Mean Girls star tweeted a photo of the knife and a message for the Transportation Security Administration (TSA) after boarding a plane.
She wrote: "Dear TSA: This Swiss Army knife wasn't detected through security and I unknowingly carried it on board. Scary!"
According to The Huffington Post, last year the TSA said it will allow retractable knives with blades shorter than 2.4 inches in carry-on bags but months later it abandoned the decision.
In 2012, a girl in America accidentally carried a knife onto a plane and took a photo of it as proof while in the plane toilet.
The girl uploaded the image to a social networking site, and wrote: "For the record, I was on an international flight and went through the x-ray scan, a manual inspection and customs before I went into my purse to get some eye drops and realised that I had forgotten to pack my knife in my checked luggage."