The Tehran-Yerevan plane crashed because of the blast in cargo compartment. The Italian Corriere della sera writes arms intended for Hezbollah were in compartment. According to the newspaper, there was a large number of detonators produced with state-of-the-art technologies in the cargo compartment. The cargo was to be transported through Armenia and Turkey to Syria and further to Lebanon.

The Caspian Airlines aircraft crashed 16 minutes after the takeoff on July 15. All the passengers and crew members were killed.