MINNEAPOLIS (AP) — The Justice Department is investigating whether Minnesota Gov. Tim Walz and Minneapolis Mayor Jacob Frey have impeded federal immigration enforcement through public statements they have made, according to two people familiar with the matter.

The investigation focused on potential violation of a conspiracy statute, the people said.

The people spoke to The Associated Press on condition of anonymity because they were not authorized to discuss a pending investigation by name.

CBS News first reported the investigation.

In response to reports of the investigation, Walz said in a statement: “Two days ago it was Elissa Slotkin. Last week it was Jerome Powell. Before that, Mark Kelly. Weaponizing the justice system and threatening political opponents is a dangerous, authoritarian tactic.”