The man, whose identify is yet to be established, suddenly attacked the owner of the meat shop at his store in Hatidisha locality of Naxalbari and hacked him to death with a sharp-edged weapon, a senior police officer said.
The man then went berserk lunging towards a young woman, who was passing by, and stabbed her repeatedly, police said.
As the woman slumped to the ground, the assailant threatened the crowd which gathered there. But he was overpowered and beaten up, the officer said.