Falcomatà is a member of the centre-left Democratic Party (PD).
Giuseppe Neri, the caucus head in the Calabrian regional assembly for Giorgia Meloni’s Brothers of Italy party, and Francesco Sera, a PD Reggio Calabria city councillor, are also being probed.
Carabinieri police on Tuesday arrested seven people and put four under house arrest in a major operation linked to the investigation.
Three other suspects are obliged to regularly sign in with the authorities.
The probe is into alleged deals regarding the 2020 and 2021 regional elections in Calabria and the 2020 municipal elections in Reggio Calabria, according to the sources.
Prosecutors had requested the arrest of Neri and Sera, but a preliminary investigations judge refused to grant warrants for them, the sources said.
ANSA