Chandigarh, Apr 18 (UNI) In a major breakthrough, Anti-Gangster Task Force, Punjab (AGTF) and Tarn Taran Police, in a joint operation, arrested two key associates of terrorist Landa Harike and Gangster Satta Naushera, Yuvraj alias Jaggu and Mehakpreet alias Mehak, after an exchange of fire near Jawanda village in Tarn Taran district, said Punjab DGP Gaurav Yadav on Friday.