https://www.reuters.com/article/us-r...-idUSKBN1KP086
Mi-8 helicopter which was carrying external suspended cargo and no passengers completed take-off first. Second to take off was a Mi-8 helicopter carrying passengers,” the watchdog said.“After take-off, according to early reports, the Mi-8 carrying passengers knocked into the external cargo of the other helicopter, for reasons unknown. As a result it fell, broke apart and caught fire,” the watchdog said, adding weather conditions were normal.