Police in Roberts, Wis., announced an arrest has been made in the arson fire that tore through St. Croix Central Elementary School on Tuesday, displacing 600 students.
At 5 p.m. on Thursday, investigators made an arrest; however, no other information was immediately offered.
"This is an outstanding example of federal, state and local law enforcement joining forces to successfully solve this senseless, violent crime," said Roberts Police Chief Daniel Burgess.
The ATF had previously offered a reward of up to $5,000 for information leading to an arrest.
Charges are expected to be filed by the St. Croix County District Attorney's Office on Friday.
Burgess also thanked residents and the various agencies that assisted in investigating the case, saying, "I would like to wholeheartedly thank each of these agencies and the community for all of the support."
The fire was first reported at 3:46 a.m., and the Roberts-Warren Fire Department suppressed the flames with the help of several area agencies. Later in the day, investigators confirmed signs of forced entry had been found.
The fire closed St. Croix Central Elementary for the remainder of the school year. Starting Monday, the children will be taking classes at the Rolling Ridges Girl Scout Camp.