Prosecutors are accusing four conservative politicians of financing election campaigns with false receipts and donations from companies under investigation for tax evasion.
The corruption probe is one of several that have shaken Chileans’ confidence in politicians recently.
Those accused Monday include former Sen. Jovino Novoa, a founder of the Independent Democratic Union party and three other past or present officials. Novoa has not spoken about the allegations. One of the others, Sen. Ivan Moreira, has said he made an error but did not believe he committed a crime.
Investigators say that the Penta financial group had used false receipts to finance the party. Prosecutors have also said the SQM mining company funneled large amounts of money to politicians linked to the coalition of President Michelle Bachelet.