  Historically there were two main reasons to assign the 1908 Tunguska event to
a spacebody infall: a) newspaper notes about a fall of a meteorite near the
town of Kansk (later claimed to be false); b) eyewitnesses reports about seeing
luminous phenomena in the sky. This paper examines accounts of the Siberian
eyewitnesses about luminous phenomena in the sky, collected in 1908,
immediately after the event. The conducted generalization of the available
accounts reported in 1908 indicates that eyewitnesses reported several types of
luminous phenomena.
