Police are trying to determine whether water documents were stolen from Flint City Hall during a recent break-in.

Police said today that someone broke into the vacant executive office that contained documents about Flint’s water crisis. It was the only office targeted, police told Motor City Muckraker this evening.

“The office that was broken into is where some water files are kept,” Flint Mayor Karen Weaver told MLive. “However, at this point it’s hard to tell if any files were taken.”

Newly released documents show that Gov. Rick Snyder’s office ignored health records about elevated lead in Flint’s drinking water. Months later, Snyder finally acknowledged that Flint’s water was contaminated, causing elevated levels of lead in residents’ blood.

The U.S. Attorney’s Office is investigating the handling of the water crisis.