Many air traffic controllers in New York City, United States of America (USA) heard a frightening threat, on Monday, related to the killing of Iranian General Qassem Soleimani in January 2019 and the vote by Congress to choose President-elect Joe Biden.
"We are flying a civil plane to the Capitol on Wednesday. We will take revenge on Soleimani," said the video, published by the American "CBS" network.
The threat points to the commander of the Quds Force in the Iranian Revolutionary Guards, Qassem Soleimani, who was killed in a US raid on January 3 last year.
Since the killing of Soleimani, Tehran has long pledged to take deterrent revenge for the killing of one of its largest and most important leaders.
Iranian forces carried out a missile attack on the American Ain al-Assad military base in Iraq on January 8 of last year, which resulted in the injury of more than 100 American soldiers with brain injuries.
The US network reported, citing sources, that the US Department of Defence (Pentagon) and other security agencies were informed of the audio on Tuesday.
According to the American Network, "Whoever sent the recording is anonymous. While the FBI believes that the warning of an attack is not serious, it is being investigated as a breach of flight frequencies."
The office indicated that it "takes all threats of violence against public safety very seriously."
The sources said that they believe that "the threat aims to imply that the Capitol will be struck on the same day that Congress is scheduled to count the Electoral College results, which will certify Biden's victory with 306 votes against 232 for Donald Trump."
Experts say that penetrating air frequencies is a cause for concern because it may affect the instructions pilots get about how and where to fly.
Other sources confirmed to CBS that a message was sent to the air traffic controllers, on Tuesday that they must immediately report any threat or aircraft deviating from its flight path.
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