Magnitogorsk local Artyom Ibragimov described how he used his drone to help emergency workers check the 10-storey building collapse site shortly after the tragedy, footage from Wednesday shows.
In the early morning of December 31, he was at work when his colleague informed him of the tragedy.
'Without a moment's hesitation' he headed to the scene and asked whether his help was needed and at... Еще about 09:00 local time (04:00 GMT), launched his drone to observe the debris.
'Then I came here, entered the security perimeter, and launched the drone. It turned out there was a threat to emergency workers which was undisclosed. At a height we noticed major roof cratering,' he said.
'Everything became less important. Our city has united to pull through this tragedy. It was impossible to stay cold,' Ibragimov added.
Ibragimov bought the device about 18 months ago, and uses it to explore places worth seeing in and around Magnitogorsk as a hobby. He works as a blast-furnace keeper for a local factory.
At about 06:00 local time (01:00 GMT) on Monday, an entire section of a 10-storey tower block in Magnitogorsk collapsed, causing dozens to be trapped under debris in freezing conditions.
At least 23 people were killed in the blast believed to have been caused by a gas leak, while another 18 remain missing.
Discover Ibragimov's footage here https://video.ruptly.tv/#/videos/20190101-049