Tons of liquid milk chocolate are spilled and block six lanes on a highway after a truck transporting it overturned near Slupca, in western Poland, on Wednesday, May 9, 2018. (AP Photo)

A truck full of liquid chocolate spilled across a major highway in Poland Wednesday, causing a hectic cleanup nightmare for highway officials, the Associated Press reported.

A tractor-trailer moving chocolate across Poland flipped over near the town of Slupca, causing the chocolate to spill out on the highway. The liquid milk chocolate hardened and blocked traffic, “creating a nightmare for clean-up crews,” according to USA Today.

The chocolate filled six lanes across the A2 highway, which stretches between Poznan and Warsaw in Poland (about 185 miles).

As USA Today reported, the driver sustained a broken arm in the crash. No one else was hurt. Officials remain unsure what caused the crash.

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Videos and photos of the incident made their way to social media.

Senior Brig. Bogdan Kowalski, of Slupca’s fire brigade, told the AP hardened chocolate is difficult to clean up.

“The cooling chocolate is worse than snow,” Kowalski said.

Marlena Kukawka, Slupca’s police spokeswoman, told the New York Times it would take hours to clean up.

“It’s been a long time since I’ve seen so many smiles on the faces of emergency rescue folks and police officers at the scene of an accident,” Kukawka said.