Andrija Mandić, Milan Knežević and others were acquitted in the case known as "coup d'état", i.e. attempted terrorism on the day of the parliamentary elections in 2016.
The verdict was pronounced by the Council of the High Court in Podgorica headed by Zoran Radović.
Radović said in the explanation of the verdict that of all the weapons, only two "Lenovo" brand mobile phones were brought into Montenegro.
The judge said that the allegations in the indictment that the cooperating witness Saša Sinđelić entered Moscow and that he met with the organizer of the criminal organization Eduard Šišmakov were not proven.
The letter from the Russian Federation established that Sinđelić did not pass passport control and did not cross the border.
"So it has not been proven that Sinđelic was in Moscow," said Radović.
He said that Mandić's departure from Kneževica to Moscow was at the invitation of the United Russia party "and that there was nothing conspiratorial".
The weapon that was found in the house on the territory of Podgorica was taken on the reverse side from the police, and not for the preparation of an attack on the Parliament of Montenegro.
"The panel saw who the accused are, Dušić, Maksić, Branka Milić, that they are people in advanced years," said the judge.
No one from the special prosecution was present at today's first-instance verdict.
This is a repeated procedure, after the first verdict sentenced all the suspects, including the leaders of today's coalition "For the Future of Montenegro", Andrija Mandić and Milan Knežević to a total of 70 years in prison.
That verdict was overturned three years ago in the Court of Appeal and a retrial was ordered.
Special prosecutors Zoran Vučinić and Siniša Milić proposed to the court that the organizers of the criminal group, Russian citizens Eduard Šišmakov, be sentenced to 15 years in prison, and Vladimir Popov to 12 years.
They requested that the former commander of the Serbian Gendarmerie, Bratislav Dikić, be sentenced to a single sentence of eight years in prison. For Predrag Bogićević and Nemanja Ristić, a sentence of seven years in prison was proposed in the closing arguments.
For former Democratic Front (DF) leaders Andrija Mandić and Milan Knežević, prosecutors requested five years in prison each.
The prosecution proposed a sentence of three years in prison for the defendant Branka Milić, while a year and six months in prison was requested for Milan Dušić and Srboljub Đorđević, and a year and nine months in prison for Dragan Maksić.
For the driver of former DF leader Mihail Čađenović, the prosecutor asked for a year and six months in prison.
A suspended sentence was proposed for Kristina Hristić.
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