Tong was arraigned earlier today and is being held at the Ingham County Jail on a $500,000 cash or surety bond.

During this past week the Department of Police and Public Safety (DPPS) responded to reports of property damage inside Wells Hall, which was “directly related to alleged criminal activity,” the release continued.

After identifying Tong as a suspect, DPPS “made contact with him” on Sunday inside the building. MSU announced that the building would be closed on Monday morning.

“That individual was in possession of multiple substances that can be legally purchased in retail stores or online,” the release stated. “The chemicals include sodium hydroxide pellets, hydrochloric acid, methanol, isopropyl alcohol, acetone, and butane.”

Once DPPS developed probable cause to arrest Tong from their ongoing investigation the case was presented to the Ingham County Prosecutor’s Office earlier today, with felony charges issued shortly after.

DPPS Police Chief Mike Yankowski, in a campus-wide email, wrote that multiple tests performed by the Office of Environmental Health and Safety (EHS) confirmed “the environment in Wells Hall does not pose a risk to our community.”

After first indicating that Wells would reopen on Tuesday, officials decided to close the building for the remainder of the week.

The decision was made to provide DPPS time to gather evidence and allow EHS to “inspect the building, clean and assess damage to flooring, fixtures and other surfaces, and work with Infrastructure Planning and Facilities (IPF) to remediate and ultimately restore the impacted spaces. ”

Wells Hall will remain closed through Friday, May 1, as the building is evaluated to ensure its safety for occupants.