TEHRAN – A well-informed security source has shed light on the findings of the thorough investigation into the tragic helicopter crash that claimed the life of President Ayatollah Raisi.

According to the source, which was quoted by the Fars News Agency, the investigation, has reached its final conclusions. These findings indicate that the flight crew and responsible authorities followed almost all necessary protocols designed to ensure the safety of the President during the flight, with only two exceptions.

The source explained that, in line with standard security protocols for presidential travel, two different types of helicopters were used for the journey. As part of the pre-established security measures, these helicopters were deliberately not equipped with GPS systems. This decision, made to enhance security, aligns with standard practices aimed at minimizing the risk of tracking or interference.

The investigation also considered the possibility of sabotage, particularly through electronic means such as jamming or hacking. 

However, the source emphasized that the helicopters involved were largely mechanical in nature, which effectively ruled out any chance of such electronic tampering. Additionally, as per the established security procedures, the flight leaders were switched during both the outbound and return legs of the journey, further complicating any potential sabotage attempts.

In response to concerns about the possible use of chemical agents, the source confirmed that extensive tests were conducted, and no traces of such substances were found. This finding dismisses any speculation that chemical agents played a role in the crash.

The investigation also included a comprehensive review of potential human factors. The source revealed that around 30,000 individuals were subjected to rigorous security and intelligence analyses following the incident. The results of these investigations were clear—no human factors or suspicious activities were detected that could have contributed to the crash.

Weather conditions were also closely scrutinized. The source noted that the meteorological department had provided the flight teams with the necessary weather information the night before the planned flight. The teams were instructed to complete the flight before 1:00 PM, a directive that was critical given the forecasted weather conditions.

However, the investigation identified two key factors that contributed to the crash. The first was a delay in the flight's departure, caused by the President's meetings, which resulted in the weather conditions deteriorating as the flight progressed. The second factor was the helicopter's excessive weight, which was exacerbated by the atmospheric pressure in the region. 

The helicopter was found to be carrying two more passengers than allowed under the established security protocols. When the pilot encountered a dense fog and attempted to adjust the helicopter's altitude, the aircraft lacked the necessary power to make the adjustment. The limited visibility due to the fog ultimately led to a collision with a mountain.

In conclusion, the security source confirmed that the investigation has been completed, with all findings pointing to the incident being a tragic accident. The comprehensive review by the security and intelligence agencies has ruled out any foul play, ensuring that the circumstances of the crash are fully understood and addressed.