A tragic discovery was made at the University of Michigan after a 19-year-old student, who went missing following a fraternity event, was found deceased. The student, Lucas Mattson, had ventured out into the frigid winter weather wearing only a T-shirt and jeans.

Mattson, an engineering student, was last spotted around 1 a.m. on Friday, January 23. Despite the plummeting temperatures that reached as low as 0 degrees, he left without a coat, according to the university’s public safety division.

After an exhaustive 20-hour search conducted under severely cold conditions, his body was finally located on Saturday night, officials reported.

Preliminary investigations indicate there were no obvious signs of trauma, and authorities do not suspect foul play. The Washtenaw County Medical Examiner’s Office is tasked with determining the exact cause and manner of Mattson’s death.

Lucas Mattson was last observed walking in Ann Arbor, Michigan, as temperatures fell to the freezing point. (Information provided by the University of Michigan Department of Public Safety and Security)

Mattson was reported missing to the Ann Arbor Police Department (AAPD) 15 hours after he was noticed missing at 1 a.m.

The nearly 20-hour search effort to locate him took place in extreme cold conditions and included officers from AAPD and University of Michigan Division of Public Safety and Security, as well as the University of Michigan Police Department Drone Unit, the agency said.

The University of Michigan’s campus. Officials said that Lucas Mattson, 19, disappeared during sub-freezing temperatures.  (Getty Images)

Authorities said that Mattson was last seen wearing a light colored T-shirt, blue jeans and white sneakers when he disappeared from the fraternity party.

“Please join me in extending our deepest condolences to Lucas’s family, friends, and all who loved him,” University of Michigan interim president Domenico Grasso said in a statement, warning against “misinformation” spreading about his death around the school community.

A missing persons flyer for 19-year-old Lucas Mattson. (University of Michigan Department of Public Safety and Security)

Grasso also said he has asked school officials to retrace the events of the night Mattson disappeared “to better understand what transpired and identify possible steps to help prevent similar tragedies in the future.”

“I am grateful for the outpouring of support from so many people worried about Lucas’s welfare, including those who searched for him in extremely difficult weather conditions,” the university president said.