Sources

-https://www.rt.com/russia/618461-strike-ukrainian-drone-launch-site/
-https://timesofindia.indiatimes.com/videos/international/russian-iskander-m-missile-strike-ukrainian-drone-launchers-in-sumy-kharkiv-video/videoshow/121552178.cms
-https://kyivindependent.com/the-missile-no-longer-flies-straight-ukraine-says-russia-improved-its-ballistic-missiles/