The incident occurred within a week of lynching of an ITI student on the suspicion of stealing a buffalo at a village in south Bengal.
Locals at Damdim tea garden in Mal area claimed they saw four persons trying to lift a goat in a car. They captured two of them, beat them up, killing a person on the spot, police said.
The other person is now in Mal hospital in a critical condition, they said.
An ITI student, who came to a village in South 24 Parganas district to visit his aunt, was lynched on May 9 by a mob who suspected that he had stolen a buffalo.