Four people were shot dead and two others were severely injured in a shooting late Saturday night during what is suspected to have been a mob attack, police said Sunday.

The incident occurred at the Kazu bar in Maebashi City, Gunma Prefecture, about 1.5 km northeast of JR Maebashi Station.

Three of the four victims -- Fukuji Mizuishi, 53, Hatsuko Satori, 66, and Teruji Okawara, 50 -- were apparently unconnected to the mob and were caught in the cross fire, according to the police.