The Chicago Police Department’s got egg on its face. Make that tomato sauce.

City police officers shut down the busy downtown State Street on Tuesday to investigate a suspicious device. The officers acted “out of an abundance of caution,” said Officer Michael Carroll, a Chicago police spokesman, the Daily News reported.

The object was weird looking: Some sort of can-shaped device with four wheels, held together with rubber straps and tape.

But it turned out the suspicious device was a can of Chef Boyardee ravioli. In the video below, a police officer holding the device can be heard saying it was part of a school project. “A DePaul spokeswoman said it was a prototype of a car, made by a student in a design class. The student placed the device on State Street to take a photo, she said,” CBS-2 reported.

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Suspicious package at 247 S State. Street and pedestrian traffic now blocked off. #ChicagoScanner pic.twitter.com/Jm1OKEzQCG — Eric Tendian (@EricTendian) April 30, 2019

“Police shut down the 200 block of State Street around noon. The street was open by 12:30 p.m,” CBS-2 reported. “The Red Line, which runs right underneath State Street was briefly shut down, police said.”