Sourcing status: Sourced and not flagged as disputed (see Sources section below for the 2 citations this entry is based on).
A reddish sphere was reported descending onto Height 611 outside Dalnegorsk. Soviet Academy of Sciences researchers conducted on-site material analysis; recovered debris (lead spheres, mesh, glass) was studied at the Far Eastern Branch of the Academy.
Sources
peer_reviewed: Dvuzhilni, V. Far Eastern Branch USSR Academy of Sciences analysis, 1987
book: Vallée, Jacques. UFO Chronicles of the Soviet Union (1992)