Georgia's State Security Service said Wednesday that it was investigating an assassination plot against former Prime Minister Bidzina ivanishvili. She is the honorary chairperson of the ruling party.

In a Facebook post, the State Security Service stated that it was investigating criminal activities aimed at "violently overthrowing" the government and creating unrest.

The report said that among these was a plot to kill Ivanishvili. He is the richest man in the country, who founded the ruling Georgian Dream Party and served as prime minister between October 2012 and November 2013.

The 68 year old billionaire who made his fortune as a Russian in the 1990s returned to public life this spring, as a strong advocate of a bill against "foreigners".

The bill that requires organizations to register as "agents for foreign influence" if they receive more than 20% of their funding abroad sparked mass protests and political chaos in Tbilisi, the capital.

The security service did not name any suspects, but the independent Caucasus News site OC-Media reported that at least six individuals had been summoned to be questioned. Citing a lawyer and two people from this group, it said they were all being questioned. The majority of those arrested had fought in Ukraine against Russia.

The SBU, Ukraine's security service, did not respond to a comment request immediately.

Georgian State Security Service did not respond immediately to an email request for comments. The post did not mention Ukraine.

Tinatin Bokuchava is the leader of the United National Movement, an opposition party. She said that reports of a plot to stage a coup were "absurd delusion" and a "constant conspiracy theory", put forth by Ivanishvili, before the parliamentary elections due in October.

Bokuchava, a Georgian news agency, was quoted as saying that the reports were "Russian propaganda" or what our Western allies call hybrid war. The purpose of the reports is to deceive the public and keep Georgian Dream at power.

Georgian authorities accuse Ukraine-based Georgians who are fighting against Russia, of plotting to overthrow the government in Georgia. Tbilisi has said it opposes Russia’s war, but hasn't joined sanctions against Moscow. (Reporting and writing by Lucy Papachristou, Editing by Andrew Heavens; Sharon Singleton, Timothy Heritage and Timothy Heritage).