Laurent,
it was the NKVD resistance group "Centr" under leadership of Viktor Aleksandrovich Ljagin. The explosion on the air field was orginize by Alexander Petrovich Sidorchuk who works at the field. He collect 200 kg explosive and set time detonator on 24 hours forward. 27 planes were destroyed as well the bomb stockpile
http://www.seltso-city.ru/museum/zal....php#sidorchuk