Wisconsin police have been left baffled after a construction worker allegedly found a brain wrapped in tinfoil on Lake Michigan’s Racine Beach.

Jimmy Senda says he was looking for beach glass when he stumbled upon the “brain” last Tuesday. The tinfoil which the brain was placed in also contained flowers and cash, according to him.

“I came across this square package, wrapped in aluminum foil, and around it, it had a pink rubber band,” the man told Fox 6.

“Curiosity got to me, so I popped it open and it looked like a chicken breast — kind of. It took a little bit for it to really (register) of what was going on.

“It was a brain.”

Senda claims he found the package in Samuel Myers Park at Racine, which is located around 60 miles north of Chicago and across the lake from Grand Rapids, Michigan.

He first shared the pictures to a Facebook group, as per the Racine Journal Times. Later on, he shared them on his own page.

Authorities in Racine are currently investigating the shocking item, they told CBS 58.

The package was sent to the Milwaukee County Medical Examiner’s office to uncover whether it is real and if so, what animal it came from.

They do not believe it is a human brain but are still waiting for confirmation.

The man who found the package says he is glad he found it before someone else did.

“There’s kids that play here,” Senda told CBS 58.

“I mean, I mentally can take it, I can handle it. But who knows some people may not be able to handle it like I did.”

See FOX6’s report on the story in the video below.