Authorities are searching for a beloved college professor who vanished during a morning walk on Labor Day.

Northwestern University Professor Nina Kraus, 72, was reported missing on Monday, Sept. 1, after she was last seen leaving her residence on the 1500 block of Ashland Avenue in Evanston around 9 a.m., according to the Evanston Police Department.

Kraus, a communications professor and nationally recognized researcher in auditory neuroscience, was wearing a windbreaker, long pants, and carrying a dark-colored backpack when she left home. She is described as being approximately 5 feet 4 inches tall with long silver hair.

“The University is hopeful that with the community’s help, we can find Professor Kraus and assure her safety,” the school said in a statement shared by Northwestern Now.

Northwestern University campus in Evanston.  (Chris Walker/Chicago Tribune/Tribune News Service via Getty Images)

“Sending prayers for someone i know and admire,” one person commented.

Another former student shared, “She’s a brilliant professor and researcher at Northwestern. I took her class when I was a student there. This is heartbreaking.”

Authorities are urging anyone with information about Kraus’s whereabouts to contact the Evanston Police Department at 847-866-5000. Northwestern officials said they will also provide updates as the search continues.

Stepheny Price covers crime including missing persons, homicides and migrant crime. Story tips: stepheny.price@fox.com.