Vučić: Russian FSB members arrived to investigate allegations about sonic cannon

Serbian President Aleksandar Vučić said that members of the Russian Federal Security Service (FSB) had arrived due to allegations of the use of a "sonic cannon" at a protest in Belgrade on March 15, which the authorities deny.

FSB members arrived in Belgrade on the evening of March 28, according to Vučić, and will stay for several days, seven or eight, after which, as he announced, they will come out with their position on the "sonic cannon".

"So that we can dispel some more lies, so that we can show what they are using to deceive," said Vučić, referring to the opposition, during his stay in Pionirski Park, where "Students 2.0" who say they want to study are located.

Serbian authorities recently called on the United States Federal Bureau of Investigation (FBI) and Russia's FSB to conduct independent investigations into whether a sound cannon was used at the March 15 protest in Belgrade.

At a protest on March 15th, held at the call of students in the blockade, while hundreds of thousands of citizens silently paid tribute to the victims of the Novi Sad accident, those gathered on King Milan Street suddenly fled from the roadway - in the face of what they describe as strong and unusual sounds and vibrations.

There is currently no official information on what caused such a reaction.

After the protest, witnesses spoke of loud sounds, vibrations in the body, and some said they felt heatstrokes.

There are also numerous testimonies about health problems in the days after the protests.

The students on the blockade, who called for a protest, accused the authorities of using a "sound cannon".

Most of the opposition joined in.

Protests in Serbia have been taking place for months, demanding accountability for the collapse of the concrete canopy of the Novi Sad Railway Station on November 1, when 16 people were killed and one seriously injured.

In a few days, the Serbian authorities went from saying that the police do not have a "sonic cannon", to threatening to prosecute anyone who spreads "such deceptions" and "disturbs the public", to admitting that the police do have sonic devices, but that they have "never used them".

The "sonic cannon" belongs to a group of non-lethal weapons that can be used for police and military purposes - for riot control, repelling attacks, or communicating over long distances.