Two Republican parties officials were behind the confusing automated phone calls to Chicago election judges ahead of the election, the Chicago Sun Times reported.

The weekend before the election, multiple election judges received robocalls telling them that they needed to attend additional training in order to help with the Nov. 4 election. At least one robocall gave the judges instructions on voting.

It was not immediately clear who recorded and sent out the calls. Chicago Mayor Rahm Emanuel called for an investigation into the calls, as they may have caused numerous election judges not to show up for work at the polls on Nov. 4.

The Sun Times on Friday identified Republican committeeman Jim Parrilli as the voice in one of the robocalls telling judges to attend another training. He identifies himself in some of the calls. In one robocall he tells judges that they should vote, and that “part of being a Republican judge means supporting our Republican ticket.”

Sources told the Sun Times that Parrilli was working with Sharon Meroni, who helps the Cook County Republican Party recruit election judges. Meroni reportedly recorded another robocall for election judges telling them how to report issues.

Sun Times columnist Mark Brown described Meroni as “a Republican wingnut who considers herself a one-woman crusader against vote fraud in Illinois — in between her efforts to prove Barack Obama is not a U.S. citizen.”

In the past, Parilli has apparently tried to prove that Rahm Emanuel is not a Chicago resident.

Although two Republican officials have been identified as behind the calls, the Cook County Republican Party denies that it had any official involvement.

“Anything they did, they acted alone,” Cook County Republican Party Aaron Del Mar told the Sun Times.

Listen to a couple of the robocalls courtesy of the Chicago Sun Times: