The two were identified as Sucha Singh of Palla Megha village and Angrej Singh of Chughe Kishore village; the one who fled the spot was identified as Bohar Singh of Wahka village.
On being searched, a plastic bag with 12 packets containing the heroin was recovered.
A case under the NDPS Act was registered against the accused at Mamdot police station.
Sucha had already been booked in several cases of drug smuggling and seizure of arms, said the SSP.
During investigation, Sucha confessed to repeatedly travelling to Pakistan.