Aug 6 (Reuters) - Russia's air defence system destroyed two aircraft-type drones over the Karachevskyi district in the Bryansk region, Alexander Bogomaz, governor of the Russian region that borders Ukraine, said on Sunday. Russian authorities say the Bryansk region - which borders both Ukraine and Belarus - has seen multiple attacks by Ukrainian forces and pro-Ukrainian sabotage groups in the 17 months since Russia launched its invasion on Ukraine. Russian authorities say the Bryansk region - which borders both Ukraine and Belarus - has seen multiple attacks by Ukrainian forces and pro-Ukrainian sabotage groups in the 17 months since Russia launched its invasion on Ukraine