The New Rightist Party, the Republican Party, the Conservative Party and the Freedom movement issued a statement denouncing the Justice party, led by former state security minister Igor Giorgadze, and alleging that his party was backed by the Kremlin.
"The Justice party and its supporters are working against Georgia's interests, because they are acting with financing and under direct orders from revenge-seeking forces in Russia," the statement said.
The groups also said it was possible that incumbent President Mikheil Saakashvili and Giorgadze had been plotting to create a second center of power to neutralize the main opposition forces.
Giorgadze left the South Caucasus state in 1995 after an assassination attempt on President Eduard Shevardnadze. The ruling authorities accused him of masterminding the attack and put him on the Interpol wanted list.
Giorgadze, who is currently in exile in Russia, said May 24 that he had the legal possibility in Russia to fight the charges against him and get himself taken off the wanted list. He also said his activities would focus on cooperation with Russia.
"I have often said that I am in favor of... establishing friendship with Russia," he said.
Konstantin Deych, the ex-minister's lawyer, Wednesday called accusations against his boss ungrounded, and said Giorgadze was the only Georgian politician who was feared by the current regime.