Acting on a tip off, a police team intercepted the vehicles of the accused near Sirhind Mandi, and during the checking seized two revolvers, three pistols, 19 cartridges and 20 gram of heroin from their possession, SSP Fatehgarh Sahib Alka Meena said.
"They were supplying heroin to college and university students, including in Patiala and Fatehgarh Sahib districts," police said.
"Investigations revealed that the accused were alleged drug addicts," they said.
"Several cases of murder, taking possession of the disputed land and other cases have been registered against them in Himachal Pradesh also," police said.
Among the four accused, three of them are graduates and they were coming from Ambala side when their vehicles were intercepted by the police, they said.
Notably, the Amarinder Singh-led government in Punjab had formed a Special Task Force (STF), headed by ADGP Harpreet Sidhu, to end the drug scourge as the Chief Minister vowed to wipe out the drug menace in the state within four weeks after assuming office.