Naikkhyangchharhi Police Station OC Sheikh Alamgir said they have launched an operation in the hilly areas surrounding Ledukhal from where the tobacco farmers were abducted early on Saturday morning.
The four have been identified as Abdur Rahim, Abu Syed, Abdul Aziz and Shah Alam from Garzania.
Dochharhi union council Chairman Md Habibullah said the tobacco cultivators were staying in a farmhouse in Ledukhal.