Agriculture officials have incinerated a box of dead birds that a traveler from China tried to bring into the U.S.

Officials say the birds were discovered in the passenger’s luggage at Washington Dulles International Airport last month.

When officials intercepted the package, the passenger said it was cat food. There’s still no word on what kind of birds they were.

They were tiny, about 2.5 to 3.5 inches in length. Bird imports from China are prohibited because of potential exposure to avian influenza.