Men from Sector 20 police station arrested the four criminals from near a sector 17 drain late last night.
They were identified as Mohan Singh Rajpur, Brij Nandan, Hemraj and Neta, said Senior Superintendent of Police (SSP) Praveen Kumar.
A country-made pistol, three mobile phones and 1.5 kg Ganja were recovered from Mohan who is the gang leader, Kumar said.
A 21-inch TV set and one kg Ganja were recovered from Brij, while two laptops and 1.5 kg Ganja and 4 mobile phones were seized from Hemraj.
Two Cameras, two TV remote controls, three foreign watches, four mobile phones and one kg Ganja were recovered from Neta, he added.