MILWAUKEE (WTAQ) - A Delta Air Lines flight from Milwaukee to Detroit was held up Wednesday morning, after a passenger found a live shotgun shell in his seat.

According to the Milwaukee County sheriff’s department, the man notified the flight crew at 6:45 a.m. And all the passengers on the plane were shuffled back to the terminal at Mitchell International, where they went through a second security screening.

Nothing suspicious was found during the second screening. A sheriff’s K-9 unit also went through the aircraft and found nothing.

The passengers were then allowed to re-board. Delta said the flight was delayed about an hour, but it finally landed in Detroit at 9:55 a.m.