Emergency crews were on the scene of a fire in the heart of Plymouth early Thursday morning.
The fire broke out at around 1 a.m. at an apartment building on Mill Street in the downtown area of the Sheboygan County city.
Several fire departments were on the scene several hours later, pumping water from the river onto the structure and actively putting out hot spots.
The extent of the damage is not clear.
No injuries were reported as a result of the fire.