Six Nations police are investigating the theft of various papers, files and personal items they say were stolen from the ransacked offices of the elected council.

Police say they were called to the elected council's administrative office on Chiefswood Road in Ohsweken Monday to end a two-month protest there. Supporters of the Haudenosaunee Confederacy Chiefs Council (HCCC) had been camping out on the property, preventing elected council staff from entering the building.

The elected council got a court injunction last week, and officers were called to keep the peace as the council returned to the building, Six Nations police said in a media release.

When they entered, police say, they found offices ransacked.

"Items stolen from the elected council building included various papers, numerous files, as well as personal items belonging to the employees," the release said.

The elected council said in a statement that "it was clear that the building had been broken into."

"Several offices had been rummaged through and materials have been stolen from the office of the elected chief and the senior administrative officer," it said.

Monday marked the end of an occupation that began May 27. Protesters were seeking recognition of the HCCC "as our Indigenous form of accountable governance," a representative previously told CBC News. The group wanted to talk about a range of issues, including taxes and alleged corruption.

Elected council said it met with the HCCC at the Sour Springs Longhouse on June 5 and agreed to a joint working group. But it wouldn't sign a document recognizing the confederacy chiefs council as the governing body.

"The current governance issues we face were inherited by us from the previous generations," elected council said in a statement. "We did not create this situation."

Elected council staff, along with family and supporters, went back to the office at 8:30 a.m. Monday. On arrival, there were six to eight protesters there, some of whom were escorted off the property, Six Nations police say. There were no arrests or injuries.

"Community members then continued to clean up the property," police say.

The investigation continues. Anyone with information is asked to call Six Nations police (519-445-2811 ) or Crime Stoppers (1-800-222-8477).