Firefighters said it happened around one in the morning and the small fire started inside a commercial dryer.
The Green Bay Metro Fire Department said the fire was kept in check by the activated sprinkler system.
No one was hurt, and people were eventually able to go back inside the hotel.
Interim Fire Chief Todd Germain said the department received multiple calls about the fire about 11:25 a.m.
When firefighters arrived, they saw “heavy flames” coming from a back wall at the hotel and they were able to quickly knock it down, Germain said at the scene.
Germain did not know immediately how many people were staying at the hotel at the time of the fire, but said everyone was evacuated safely.
After knocking the fire down, firefighters remained on scene as they dug into the outside wall to look into the interior and pour water on it.
“We’re just trying to make sure there’s no fires hidden inside the walls,” Germain said.
One sprinkler system did go off because of the fire, Germain said, but there appeared to be little or no significant damage to the inside of the hotel.
He planned to work with hotel management and city inspectors to see if hotel guests could return to their rooms Thursday, Germain said.
Firefighters could be seen washing down each other’s uniforms at the scene Thursday.
“That’s something we do as part of our protocol to make sure we’re not leaving any carcinogens on our uniform,” he said.
In addition to Portsmouth, firefighters from Kittery, Maine, and Portsmouth Naval Shipyard responded to the one-alarm fire, he said.
The Anchorage Inn and Suites is near the Woodbury Avenue bridge, which was removed and is in the process of being replaced. The bridge closure did not slow the arrival of firefighters, Germain said.
“We know our way around,” he said with a smile.
The Mill restaurant in Derry Township is temporarily closed following a fire.
Mellinger said the restaurant is expected to reopen 4 p.m. April 24.
UPDATE: Today we faced a small electrical fire here at The Mill. Thank God, no one was hurt!
We appreciate the support of our friends, family and community during this time.
The Mill opened in 2014 in the Curry Mill, a landmark brick building on the west end of Hershey.
The Cedar Rapids Fire Department and Hiawatha Fire Department both responded to the scene, where an official release says they found a light haze inside Riley’s Cafe. Using thermal imaging, firefighters reportedly checked the ceiling in an area already impacted by a fire Thursday afternoon. After discovering hot spots, the firefighter reportedly began removing ceiling tiles and identified burning insulation and falling embers. Firefighters reportedly discovered multiple instances of burning insulation above both Riley’s Cafe and the neighboring Broken Spoke, both of which had already been closed because of Thursday’s fire.