The Naga fireballs , also known to as Mekong lights, and “bung fai paya nak” by the locals, is an unconfirmed phenomenon often seen in Thailand’s Mekong river, which is also seen in (Nong Khai province in Isan) and in Laos (Vientiane Province)—in which glowing balls are said to naturally rise from the water high into the air.[1] The balls are reddish and have diverse size from smaller sparkles up to the size of basketballs they quickly rise up to a couple of hundred metres before disappearing. The number of fireballs reported varies between tens and thousands per night. Objective observers who have witnessed this phenomenon report tracer bullets as probable cause.